. Fourteen weeks in zoology. Zoology. CLASS REPTILIA: ORDER TESTUBIJiTATA. 165 CLASS III. REPTILIA. General Characteristics (see Table, p. 13).—Reptiles*, being cold-blooded, require nothing to retain the heat, and so are covered only with naked skin, scales, etc. The three- chambered heart does not send all the venous blood to the lungs. Pure oxygenated blood, however, goes to the head. Eeptiles are most abundant in hot climates, those of cold regions hibernating. They are generally carnivorous, and swallow their prey whole. — -a I— o a. DO lU NEARLY COVERED WITH A BONY OR HOENY CASE WHICH BL
. Fourteen weeks in zoology. Zoology. CLASS REPTILIA: ORDER TESTUBIJiTATA. 165 CLASS III. REPTILIA. General Characteristics (see Table, p. 13).—Reptiles*, being cold-blooded, require nothing to retain the heat, and so are covered only with naked skin, scales, etc. The three- chambered heart does not send all the venous blood to the lungs. Pure oxygenated blood, however, goes to the head. Eeptiles are most abundant in hot climates, those of cold regions hibernating. They are generally carnivorous, and swallow their prey whole. — -a I— o a. DO lU NEARLY COVERED WITH A BONY OR HOENY CASE WHICH BLENDS WITH THE NEDRO- SKBLETON. COVERED WITH SQUARE PLATES. COVERED WITH IMBRICATE SCALES ; ' Mouth not hilatable ; legs generally devel- OPED, EYES WITrii LIDS. Mouth dilatable legs, no ete'lids. NO Testodinata, Tortoiee, etc Loricata, AUigator, etc Lacertilia, Zixard, etc, [ Opbldia, Sndktf etc ORDER TESTUDINATA. General Characteristics.—The Turtles have the skel- eton on the exterior of the body. The vertebrae and ribs are Mg. ««.. Skeleton of Muropean Tortoise. * There eeems little resemblance between a crawling reptile and a flitting song- ster ; yet, in stmcture, reptiles are mucli nearer related to birds than to mammals. This is shown especially in the fossil, reptile-like bird, Archaiopteryx, and the bird- like reptiles, Dinosauria and OmithosauHa. See Geology, page 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
