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130 diameters 440 diameters adult Human subject arranged in parallel average bony matter branching canaliculi breadth Canada balsam canals and lacunae canals are divided cartilage cells centre Cetacea chorda dorsalis circumferential laminae composed concentric laminae corresponding section cranium dentine described disposed in parallel edge elongated lacunae exhibit lacunae femur fibres fibrous fish ganoid ganoid layer granules Haversian canals divided Haversian systems hexagonal horizontal section humerus inch in diameter inch in length inner margin laminae and lacunae Lancelet large canals long bone long diameter longitudinal section magnified 95 diameters medullary cavity mounted in Canada naked eye nearest the name numerous Haversian canals opaque operculum osseous matter ossified oval figure parallel rows peculiar portion power of 440 power of 95 preceding specimen radii represented in Plate resemble right angles scale short diameter shown in Plate spine surrounded thin tibia tissue trace transverse section traversed tubuli vertebra vertebral column vertical section whilst
Seite xxiv - ... space, and extending gradually inwards till the system is completed. In fact the soft tissue takes the permanent form previous to the addition of the salts of bone, much in the same manner and to the same degree as occurs in temporary cartilage before the earthy ingredients are deposited. Lamination is nothing more than a definite linear arrangement of the osteal cells with their outlines permanently retained in the perfected bone ; a character much more strongly marked in the bones of adult...
Seite 176 - Portion of the lower jaw of the fossil Opossum, enlarged one half. (6) View of the crown of the tooth, twice the natural size ; (seen from within). sisting of a portion of the right ramus of the lower jaw of an opossum, in which one of the false molars is happily retained. The tooth in its symmetrical form, united with the indication of an anterior as well as posterior heel or talon, does not agree with any species of didelph with which I have as yet been able to compare it, but I think no doubt...
Seite 135 - The medullary cavity of the shaft of the long bones, which in Mammalia is either filled with marrow or with a cancellated tissue, is in Birds often smooth, and...
Seite 201 - Composition 121 which run in the direction of the long axis of the bone and are parallel to each other, communicating freely by means of transverse or oblique canals.
Seite 135 - ... developed on the outer side than on the inner side and tend to centralize at the posterior ridge and anterior surface. At the posterior ridge they occupy the entire thickness of the wall of the bone as far as the internal circumferential lamellae. At the ridge surface canals and bone lamellae take a direction at right angles to the long axis of the shaft. Along the anterior surface the systems are better developed and extend a short distance on both sides of the middle line. Interspersed between...
Seite 1 - A considerable number of miscellaneous sculptures were found by Mr. Wood in the course of his long search for the Temple of Artemis, and in minor excavations undertaken on the site of the town. Several of these have already been described in the first volume of this catalogue (Nos.
Seite 140 - Haversian canals are distributed ; very few run in the direction of the long axis of the bone, but...
Seite 66 - These scales are seated deep in the cutis, like those of the Eel, and in some situations occur at tolerably regular distances apart, but they are rarely separated by less intervals than the a\jth of an inch.