 | William Benjamin Carpenter - 1845 - 612 Seiten
...furnished with eight or ten simple eyes, which may be detected by the aid of a magnifying-glass, as a semicircular row of black points, situated above...the mouth upon the sucking surface of the oral disc ; this position is evidently calculated to render these organs of use in the discovery of food. Each... | |
 | William Benjamin Carpenter - 1848 - 606 Seiten
...furnished with eight or ten simple eyes, which may be detected by the aid of a magnifying-glass, as a semicircular row of black points, situated above...the mouth upon the sucking surface of the oral disc ; this position is evidently calculated to render these organs of use in the discovery of food. Each... | |
 | 1856 - 504 Seiten
...the perfection of their development, with the condition of the cerebral masses in relation with them. The eyes of the leech are eight or ten in number,...semicircular row of black points, situated above the month upon the sucking surface of the oral disc, a position evidently calculated to render them efficient... | |
 | William Benjamin Carpenter - 1858 - 644 Seiten
...furnished with eight or ten simple eyes, which may be detected by the aid of a magnifying-glass, as a semicircular row of black points, situated above...the mouth upon the sucking surface of the oral disc ; this position is evidently calculated to render these organs of use in the discovery of food. Each... | |
 | Thomas Rymer Jones - 1861 - 904 Seiten
...perfection of their development, with the condition of the cerebral masses in relation with them. (587.) The eyes of the Leech are eight or ten in number,...above the mouth, upon the sucking surface of the oral disk, — a position evidently calculated to render them efficient agents in detecting the presence... | |
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... the blood has passed through the alimentary canal in the ordinary manner, during all which period so much of the blood as remains undigested in the stomach continues in a fluid state. — Leeches are furnished with eight or ten simple eyes, which... 