MAMMALIA. 



559 



third toe of the manus is always large and bears a large claw. The 

 great anteater is purely terrestrial; the Tamandua and Two-toed anteater 

 {CycIotn7'i(s) are arboreal. 



Fig. 383. — Lateral View of Skull of Ant-eater. [Ad nat.) 



Maxilla. Nasal. Frontal. Parietal. Supraoccipital. 



Premaxilla. 



Lacrymal. Malar, Alisphenoid. Squamosal. 

 Note the absence of teeth, the elongated jaws and incomplete z^^gomatic arch. 



Family IV. — Dasypodidae or Armadillos. — They are unique amongst 

 mammals in having the head and body enveloped in bony dermal scutes 

 covered with horny epidermis. In the typical forms there can be 

 distinguished a cephalic plate over the head, a large pectoral and pelvic, 

 covering respectively the fore and hind part of the body, and a number 

 of rings between them. The tail is also enveloped in a series of rings. 

 The ventral surface is usually soft and hairy and the habit of rolling-up 



Fig. 384. — Lateral View of Skull of Armadillo. 



Note the absence of incisors and canines, the numerous cheek-teeth, the long 

 snout with small premaxillae. 



in a ball is common. Armadillos are largely insectivorous and have a 

 long sticky tongue with large submaxillary glands. On the other hand, 

 they have a large number of simple teeth which in many cases are 

 diphyodont. They are mostly fossorial and the toes are armed with 

 strong claws. The genus Tolypeutes, in which the rolling-up is best 

 perfected, is said not to burrow. They vary in size from the little 

 Pichiciago of 6 inches to the great Armadillo of three feet. The largest 



