Publisher's Synopsis
Excerpt from Molluscous Animals, Including Shell Fish: Containing an Exposition of Their Structure, Systematical Arrangement, Physical Distribution, and Dietetical Uses; With a Reference to the Extinct Races
The skin of molluscous animals is more simple in its structure than the same organ in the vertebral animals. The cuticle is here very distinct; and, as in other classes, it is thick and coarse where much exposed, but thin and delicate in its texture where it lines the internal cavities. A mucous web may be detected in the cuttle fish and slug, but of great tenuity. The corium is destitute Of a villous surface; and on its central aspect it is SO intimately united to cellular substance, that its fibrous structure can scarcely be distinguished. The muscular web may, in general, be readily perceived. Its fibres proceed in various directions, according to the kind of motion to be executed, and extend or corrugate the skin at pleasure.
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