. Chordate anatomy. Chordata; Anatomy, Comparative. I 12 CHORDATE ANATOMY layer of cells. Gland cells are numerous in the epidermis of Amphioxus. The layer secretes a thin cuticle like that of annelids. The corium in Amphioxus is gelatinous. Although the epidermis is stratified in all vertebrates, such low forms as cyclostomes do not have the outer dead horny layer, and they do have the thin cuticular layer of the invertebrates and Amphioxus. The skin of fishes is like that of cyclostomes, except for differences in gland secre- tions. See Fig. A. AMPHIOXUS a PETROMYZON. Please note that
. Chordate anatomy. Chordata; Anatomy, Comparative. I 12 CHORDATE ANATOMY layer of cells. Gland cells are numerous in the epidermis of Amphioxus. The layer secretes a thin cuticle like that of annelids. The corium in Amphioxus is gelatinous. Although the epidermis is stratified in all vertebrates, such low forms as cyclostomes do not have the outer dead horny layer, and they do have the thin cuticular layer of the invertebrates and Amphioxus. The skin of fishes is like that of cyclostomes, except for differences in gland secre- tions. See Fig. A. AMPHIOXUS a PETROMYZON. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son & Co.
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