PLAGIODONTIA. 



78. Plagioclontia. 



395 



Plagiodontia F. Cuv., Ann. Scien. Nat., 2me Se"r., vi, 1836, p. 347, 

 Zool. Type Plagiodontia aedium F. Cuvier. 



Skull broad; nasals broad, truncate posteriorly; infraorbital 

 foramina very large, round; superior outline descending from parietal 

 to end of nasals, and to occiput; zygomata moderately heavy, jugal 

 broad, extended; thumb rudimentary with a flat nail; the four ringers 

 with slender curved claws; toes larger, with strong compressed 

 curved claws; the middle and two outer toes longest and nearly 

 equal. Teeth without roots, diminishing in upper row from last 

 molar to premolar, which is smallest; each tooth has two oblique 

 loops horizontal to the jaw, one internal and one external, parallel 

 to each other. Lower molars nearly equal in size, the premolar 



FIG. 75. PLAGIODONTIA AEDIUM. 

 ex Ann. Scien. Nat., Paris, 1836. Plate 17, nat. size. 



