. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. 384 CLASSIFICATION OF VERTEBRATES. seven to nine movable armor bands. Tatusia novevtcinda is the only arma- dillo entering the U. S. Chlamydotheriiim from the pleistocene of Florida and Patagonia stands nearest the glyptodonts. PeUephUus, eocene of Fig. 360. Nine-banded armadillo, Tahisia. novenuincta, from Liitken. ORDER II. INSECTIVORA. Small plantigrade mammals, usually with five toes armed with claws ; carpals and tarsals usually in linear series; denti- tion complete, the incisors never less than two ; canin
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. 384 CLASSIFICATION OF VERTEBRATES. seven to nine movable armor bands. Tatusia novevtcinda is the only arma- dillo entering the U. S. Chlamydotheriiim from the pleistocene of Florida and Patagonia stands nearest the glyptodonts. PeUephUus, eocene of Fig. 360. Nine-banded armadillo, Tahisia. novenuincta, from Liitken. ORDER II. INSECTIVORA. Small plantigrade mammals, usually with five toes armed with claws ; carpals and tarsals usually in linear series; denti- tion complete, the incisors never less than two ; canines little differentiated and weak; molars bunodont or lophodont, the cusps acute; clavicles almost invariably present; brain small, cerebrum without convolutions ; placenta deciduate, discoidal. The insectivores owe their name to the fact that the major- ity feed upon insects or other small invertebrates. They are all small, and the structure points to a low stage of organization. The body is covered with fur, and spines are not infrequently developed. The milk dentition is lost at an early date, and rarely is functional. The canine teeth are not sharply differen- tiated from the incisors or premolars, and the latter are sharp sectorial. The upper molars have three or four cusps. The testes are internal, and are never enclosed in a scrotum ; the uterus is bicornuate. In a few genera vertebral intercentra occur in the dorsal region, a condition not paralleled in other mammalia. Among the more superficial but still very charac- teristic features is the prolongation of the muzzle far beyond the lower jaw. Most of the order are nocturnal burrowing animals, only a few being aquatic or arboreal in habits. In external appearance they resemble the smaller rodents ; but in structure they are more like the bats, with other resemblances to the polyproto-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration
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