. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. THE SKIN AND SKELETON. 135 is represented by a great variety of appendages to the skin, which are mainly organs for protection, not for sup- port. Some are horny developments of the ep- idermis, such as hairs, feathers, nails, claws, hoofs, horns, and the scales of Reptiles; oth- ers arise from the hard- ening of the dermis by calcareous matter, as the 1 4 TT* 1 +1 1 Fig. 101.—Skeletal Architecture in the Armadil- SCaleS 01 r lSlieS, tne OOny l0j ghowing t
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. THE SKIN AND SKELETON. 135 is represented by a great variety of appendages to the skin, which are mainly organs for protection, not for sup- port. Some are horny developments of the ep- idermis, such as hairs, feathers, nails, claws, hoofs, horns, and the scales of Reptiles; oth- ers arise from the hard- ening of the dermis by calcareous matter, as the 1 4 TT* 1 +1 1 Fig. 101.—Skeletal Architecture in the Armadil- SCaleS 01 r lSlieS, tne OOny l0j ghowing the relation of the carapax to the plates Of Crocodiles and vertebral column. Turtles, and the shield of the Armadillo. The scales of Fishes (and likewise the spines of their vertical fins) lie imbedded in the overlapping folds of the skin, and are covered with a thin, slimy epidermis. The scales of the bony Fishes (Perch, Salmon, etc.) consist of. 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 Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950. New York : Harper & Bros.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
