File:Image from page 591 of "On the anatomy of vertebrates (electronic resource)" (1866) (14775495813).jpg

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Identifier: b20416039_001 Title: On the anatomy of vertebrates [electronic resource] Year: 1866 (1860s) Authors: Owen, Richard, 1804-1892 Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds Publisher: London : Longmans, Green Contributing Library: Wellcome Library Digitizing Sponsor: Wellcome Library


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Text Appearing Before Image: at right angles to the other. In theLamprey the derm consists of two layers of flattened fibres cross-ing each other at right angles. The epiderm exhibits numerouslarge stellate pigment-cells. In the Eel, the epiderm is soft andthick, consisting of many layers of cells, caudate and tessellate,those next the derm showing pigment in stellar masses: the granular pigment-cells look like blackspots in the epiderm. On removingthis, narrow oblong scales, two linesto three lines long, fig. 361, «, are seenimbedded in depressions of the derm.They consist of a finely reticulate car-tilage, the long axis of the meshes,which may be cells with confluentwalls, running nearly parallel to thecontour of the scale, as shown in themagnified section taken at the line marked in fig. 361, a. In theBlenny (Zoarces) the skin presents circular depressions which are 1 Arctuous bands of Clark (ccxcn, p. 148), who well distinguishes them fromthe gland-ducts perforating the skin in certain fishes, e.g.,murcena.

Text Appearing After Image: Scale of Eel: a, nat. size, and portionmagn. ccxcni* TEGUMENTS OF FISHES. 547 362


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