. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. G ^ Fig 22 —a, C iticle aud lij pjdtnnis ot the lar\a of Corethra b, cuticle and hypodermis of a Gastro pacha caterpillar, with two poison glands beneath corresponding bristles. may exhibit various patterns of difl:erent kinds. Very frequently the surfaces of the individual cells are indicated on tlie cuticle as polygonal figures; and, in addition to the very fine pores, there are also found larger passages pro- duced by out-growth from the cells. These latter lead to the appearance ©f various cutic
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. G ^ Fig 22 —a, C iticle aud lij pjdtnnis ot the lar\a of Corethra b, cuticle and hypodermis of a Gastro pacha caterpillar, with two poison glands beneath corresponding bristles. may exhibit various patterns of difl:erent kinds. Very frequently the surfaces of the individual cells are indicated on tlie cuticle as polygonal figures; and, in addition to the very fine pores, there are also found larger passages pro- duced by out-growth from the cells. These latter lead to the appearance ©f various cuticular appendages, such as hairs, bristles, scales, etc., which are placed on the cuticular pores, aud con- tain as a matrix their special cell or a process of it. Cuticular membranes may obtain a very considerable thickness, and, by the deposit.'on of calcareous salts, a high degree of firmness (carapace of Crustacea) so that they acquire the value of skeletal tissue.^, which, Fig. 22e.—Cu, cuticle with bristles in the condition of ecdysis. Cu', newly-formed cuticle (Brajichipus).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
