ABRANCHIATE, the Eolis an, 107.
Acalephæ, entrance of water into the
blood in, 111.

Acanthias, no fibres in the brain of the,
376.

Acteon, the, 204, 241-peculiarity of
the ova of, 246 note.

Actinia, the finding of the first, 13-
vitality of separated filaments of the,
57-name of, first adopted, 118-lon-
gevity of, 139 note-anatomy, 156.
See also Anemone.

Aurora, the, 79-its vitality, 19
-identical with Venusta, 142.

bellis, the, 13-where found,
16-trial of its paralysing power, &c.,
132-its tentacles, 156-effects of
light on it, 230-nutriment derived
from water by it, 256-observations
on the supposed chyle-corpuscles in
it, 259.

crassicornis, the, where found,
16 chiselling it out, 18-its voracity,
127-trial of its paralysing power,
131, 133-the thread capsules in it,
149-discovery of the ovaries in it,
161-at the Scilly Isles, 201-expe-
riments on its supposed solvent fluid,
215 varieties of it, 239-variations
in size in it, 255.

depressa, the, 123.

dianthus, the, 168-the thread
capsules in it, 149-experiment on
its urticating power, 151, 152- Dr
Wright on it, 169-reproduction in
it, 170.

lacerata, reproduction in the,

170, 172.

Actiniæ, the, 12-jars suitable for, 33-
entrance of water into the blood in,111
-how their animal nature is deter-
mined, 120 et seq.-viviparous, 140—
reproduction among them, 156 et seq.
--their organisation, 158-are they of
separate sexes? 163-their so-called
digestion or assimilation, 214 et seq.
-species of, found at Scilly, 228-
effects of light on them, 230—their
circulating fluid, 255-destitute both
of blood and of chylaqueous fluid,

256.
Actinophrys, assimilation in the, 208,
217.

Eschylus on the Sea, 269.
Aeration, mode of, in Annelids, 69-
process of, in the Eolis, 107.
Agassiz on the Mactra, &c., 111-on
the identity of the Medusa and the
Polype, 321.

Age, effect of, on the brain tissue, 385.
Alcyonidium hirsutum, the, 337.
Alder and Hancock's Nudibranchiate

Mollusca, 34-on the Pholas, 86 note.
-their representations of the Eolids,
103 on the Doris, 106-on the re-
spiration of the Eolis, 108.
Allmann, Professor, on the circulating

fluid of the Polyzoa, 260-his mono-
graph on Polyzoa, 337.
Alternation of generations, 281. See
Parthenogenesis.

Ammocete, metamorphosis of the, 239

note.

Amoeba, constitution, &c. of the, 158-
organisation of the, 208 note-diges
tion in it, 217.
Anemone, how determined to be an
animal, 120 et seq.-voracity of the,
127 its alleged paralysing power,
128-its reproductive system, 155-
its structure, ib.
Anemones, importance of leaving their
base uninjured, 19 et seq.-transmis-
sion of, by post, 78-general enthu-

siasm for them, 115-errors in books
regarding them, 116 et seq.- their
stinging power, 138-disproof of their
alleged paralysing power, ib.-their
longevity and vitality, 139-edible,
140-viviparous, ib.-uncertainty of
colour as a distinction in them, 142-
the so-called urticating cells in them,
149. See also Actinia, &c.
Animal, anatomical distinctions of the,
126 note.

Animal envelope, universal importance
of the, 157.

Animal heat, influence of, on maternal
instinct, 238.

Animal and vegetable life, the mode of
distinguishing between, 120 et seq.
Animal paradoxes, examples of, 52.
Animals, relations of their organism to
light, 234-discovery of new, 247-
the identification of, 278-and man,
comparative perfection of sense in,
357.

Annelids, partiality of, for darkness,
21-the budding or gemmation of,
61-Bonnet's observations on, 63-
peculiarities of the blood of, 66 et
seq.twofold respiration of, 69-
entrance of water into the blood in,
111-digestion in, 218-effects of light
on, 230-Parthenogenesis among, 291.
Anthea, its voracity, 128-trial of its
paralysing power, 131, 133-changes
of colour in it, 143-the thread cap-
sules in it, 149-its tentacles, 156
-self-division in the, 174.

where found, 16-experiments
on the supposed solvent fluid of the,

214.

Antheas, motion in the, 125-at the
Scilly Isles, 201, 228.
Anthropomorphism, tendencies to, in
zoology, and danger of them, 368 et
seq.

Aphides, reproduction in, 283 et seq.-
Owen on it, 284-its ratio, 285-re-
searches of Huxley on the generation
of, 298.

Aphrodita, blood of the, 67.

Aplysia, the, 21--superstitions regard-

ing it, 22-peculiarities of its ova,
246 note-the so-called eyes in the,
341-its nervous system, 373, 374.
See also Sea-hare.
Apneusta, the order of, 110.

A priori conclusions, danger of, in
Zoology, 368 et seq.

Aquarium at Regent's Park, the, 4.
Aristotle on the Anemones, 117.

403

Arran, colony of Dianthi at, 169.
Ascidian, the, 23, 91-an undescribed,
278-the embryo of the, 279.
Ascidians, want of motion in the, 58,
124-peculiarities of generation in
the, 287.

Assimilation, distinction between di-
gestion and, 208-chemical solution
necessary to, 211-and digestion, not
identical, 394.

Aucapitaine, M., on the Boring Mol-
luscs, 83.

Auerbach, on the enveloping membrane,
&c., 208.

Avicularium of the Corkscrew Coralline,
the, 366.

BAER, VON, see Von Baer.

Baird, Dr, on the vitality of Molluscs,
341.

Basket, the collecting, for marine ani-
mals, 12.

Basques, peculiar custom among the,
236.

Beauty, charm of, 139.

Bee, Parthenogenesis in the, 290.
Bell, Sir C., his views on the nervous
system, 378, 379.
Beneden, see Van Beneden.
Bergmann and Leuckart on the blood,

210-on the convoluted bands, 262.
Bernard, Claude, on anatomy as a
source of error, 153-on digestion,
212.

Berryn Narbor, a ramble to, 76.
Biliary secretions, provision for, in the
Eolis, 104.

Biology, neglect of true induction in,
99.

Bird's head process of the Corkscrew
Coralline, the, 366.

Blessig on the structure of the retina,

345.

Blood, peculiarities of, in Annelids, 66
et seq.-entrance of water into the,
111-changes it undergoes before as-
similation, 210-true, definition of,
254.

Bonnet, the experiments, &c. of, on
Annelids, 63-on the reproduction of
Aphides, 283.

Books, suitable, for marine studies, 33.
Boring Molluscs, the, 81-how they
operate, 83-prevention of their ra-
vages, 85.

Borlase's account of the Scilly Isles,
184 on the former state of the Scilly
Isles, 192-historical notices from, 193.
Botryllus, the, 23.

Bovista giganteum, cell-formation in
the, 313.

Brain, increase of fibre in the, with age,
385.

Braunton road and inn, Ilfracombe, 7.
Brightwell, Mr, on the Noctilucæ, 326.
Brittle-star, the, 240 et seq.
Brown-Séquard, M., his discovery re-
garding the spinal chord, &c., 378 et
seq.

Budding or Gemmation of Annelids, 61.
See Gemmation.

CAILLAUD, M., on the vitality of Mol-
luscs, 340.

Calamary, the colour-specs on the, 94
et seq.

Calvados, the oyster-establishments at,
339.

Campanularian Polypes, Parthenogen-
esis among the, 293.

Capstone Parade, the, Ilfracombe, 28,
30.

Carp, the, a ruminating fish, 238.
Carpenter, Dr, on the Anemones, 125-
on the digestion of the Polypes, 214-
on Parthenogenesis, 293.

Carus, Victor, on the zoological wealth
of the Scilly Isles, 228-on the con-
voluted bands, 262- name given to
Parthenogenesis by, 281.
Cells, multiplication by division of, 313
- by union of two similar, 315-and
of two dissimilar, 316.
Cephalopods, the eyes of the, 341.
Cerianthus, peculiarity of sex in the,
164.

Chambercombe woods, 74.
Chamisso, discoveries of, on the genera-
tion of the Salpa, 286.
Chance-seeking, 336.
Chiaje, see Della Chiaje.
Chylaqueous fluid, what, 68-uses, &c.
of it, 69 distinction between, and
blood, 254.

-

Chyle-corpuscles, the supposed, in the
Actiniæ, 256 et seq.
Ciliary action, is it distinguishable from

life? 57.

DAISY, the (Actinia bellis), 13— where
found, 16. See Actinia bellis.

Dalzell, Sir John, on the strength, &c.
of the Anemones, 130.
Daphnia, alleged paralysing power of
the Hydra on the, 135.
Darkness, importance of, to many ma-
rine species, 21.
Decay, as a life-function, 58, 59.
Della Chiaje on the colour-specs of the
Loligo, 95 note researches of, on
the Anemones, 118- - on the repro-
duction of the Actiniæ, 173-on ner-
vous system, 371, 390.

Dendronotus arborescens, the nervous

system of the, 375 note.
Desert snail, vitality of the, 341.
Dicquemare, the Abbé, 118- on the
vitality of the Anemones, 20.
Differentiation, illustrations of, 158.

Digenesis, 281. See Parthenogenesis.
Digestion, organs of, in the Eolis, 104–
what constitutes it, 207-distinction
between it and assimilation, 208-
simplest form of, 209- its successive
forms, ib. et seq.-is mainly chemical,
211-what is included in it, 212-a
special function, 213-experiments on
the so-called, in the Actiniæ, 214 et
seq.-advance of, in the animal series,
227-assimilation not identical with
it, 394.

Dionaea muscipula, an example of a food-
seizing plant, 123.

Dissections, how done, &c., 273.
Dog, the new-born, peculiarity in nerv-
ous system of the, 376.
Dog-fish, the nervous system of the,
376.

Dorids at Jersey, 275.
Doris, the, 44-the spawn of the, 23
respiration in it, 106-peculiarity of
structure in foot of, 110-its develop-
ment, 245-the shell rudiment in it,
247-the so-called eyes in it, 341-
hearing in, 354-its nervous system,
371, 373, 374.

lugubris, peculiarity of the eyes
in the, 342.

tuberculata, the, 242.
Dragonfly, nerve-tissue of the larva of
the, 386.

Draper, Professor, on animal develop
ment, 157 on the influence of light
on plants, 232-his theory of vision,
347 et seq.

Dredging for marine animals, 88.
Dress, appropriate, for marine collect-
ing, 17.

Druidical remains, supposed, in the
Scilly Isles, 221.

EATING, defence of, 41.
Echinoderms, the, 240.

Ecker on the so-called muscles of the
Hydra, 389.

Edwards, see Milne Edwards.
Ehrenberg, the Polygastrica of, 217

405

et seq.

Eyes, the so-called, in Molluscs, 341.

FERUSSAC, Baron, on the insensibility
of the lower animals, 331.
Filiferous capsules, see Thread capsules.
Fish, paradoxes and anomalies among,
236 et seq.

Fishes, eccentricities of, 51.
Fishermen, value of, to, the marine

hunter, 272-their stupidity, 273.
Fissiparous reproduction, what, 308.
Fleming, Professor, 139 note.
Flourens, M., on the gills of fish, 338.
Food, relations of life to, 218-parallel
between, and knowledge, 219.
Forbes's Naked-eyed Medusa and
British Star-fishes, 34-on the Cri-
noidea, 205-on the Brittle-star, 241
-on the Solen, 365.
Fresh-water Polypes, Trembley on the
reproduction of the, 282.

Frog, the nervous system in the young,
375.

Function, relations between organ and,
59, 393 et seq.

Funke on the nervous system, 388.

GALL-FLY, peculiarity of sex in the, 291.
Ganglia, the, of the Doris, &c., 371 et seq.
Gem, the, 21, 24.

Gemmaceæ, haunts of the, 16-not
migratory, 125-variations in size in
the, 255.

Gemmation or budding of Annelids,
the, 61-reproduction by, 282-iden-
tity of, with generation, 308.
Gemmiparous generation, what, 308.
Geneagenesis, 281. See Parthenoge-

nesis.

Generation, gemmation identical with,
308-a mere form of growth, 309.
Germ cells and sperm cells, assumed
necessity of both to seed, 309-re-
production by union of, 316.
Giant's Castle, Scilly, 190, 191.
Gills, difference between the, in Fishes
and Molluscs, 338.

Glass jars, suitable, for Anemones, &c.,
32.

Goethe's law of animal development,

158-his love of Anatomy, &c., 274—
on growth and reproduction as iden-
tical, 313.

Goniaster, the, 240.

Actiniæ, 215 -on the convoluted
bands, 262.

Homer on the sea, 200, 269.
Huxley, Professor, classification of the
Sagitta by, 250-observations on it,
252-on Parthenogenesis, 287-on
the generation of Aphides, 298.
Hydra, alleged paralysing power of the,
135-its organisation, 157-reproduc-
tion in it, 170-digestion in it, 218
note-Trembley on its reproduction,
282-peculiarities of reproduction in
it, 310-its so-called muscles, 369.
Hydra tuba, reproduction in the, 170.
Hydractinia, the, 275.
Hydroid Polypes, reproduction in the,
170.

ILFRACOMBE, scenery of, 5-the town, 6
-a day's marine hunting at, 15-
the visitors to, 28- the Capstone
Parade at, 30-a ramble near, and
its scenery, 73-lanes, 74.
Implements, the requisite, for marine-
animal collecting, 11.
Incubating fish, an, 237.
Infusoria, digestion in the, 217.
Ingenhouss, discovery of the influence
of sunlight on plants by, 232.
Inman, Dr, on insensibility to pain in the
lower animals, 334-on the nervous
system of the Dendronotus, 375 note.

et seq.

Helianthoid Zoophytes, reproduction
in the, 171.

Hermit crab, habits, &c. of the, 46 et

seq.-Swammerdamm on the, 243.
Hills, peculiarities of the, at Ilfra-
combe, 5-effects of, on works of
man, 30.

Hippopotamus, the, 115, 116.
Hollard, M., memoirs of, on the Ane-
mones, 119-anatomy of the Actinia
by, 156-the ovaries of the Actinia
described by, 161 note, 162, 166-on
the supposed solvent fluid of the

signs of insensibility given by, 331—
peculiarities of nervous tissue in, 386.
Invertebrata, position of the retina in,
360.

JELLY-FISH, preference of, for light, 21
-the thread capsules in the, 146, 148
-production of, by Polypes, 280, 281.
Jersey, first impression of, 268-charac-
ter of its scenery, 269-boyish remi-
niscences of it, 270 et seq.

Johnston's British Zoophytes, 34, 119
-on the voracity of the Actinia
crassicornis, 127.

Jones, Rymer, his Animal Kingdom,
33-on the study of marine animals,
61-on the animal nature of the Ane-
mone, 122-on their powers of motion,
125-on the seizing power of the
Anemones, 131.

KIRKES and PAGET on nerve fibre, 377

note.

Knowledge, the food of the mind, 219.
Kölliker on the colour-specs of the Lo-