4 



Nasua. The round head of the radius indicates a complete power of 

 supination of the fore foot, and is different in form from that of Camivorai 

 including Nasua; and finally, the distal end of the radius is still more 

 different from that of Nasua, and resembles closely that of Semnopithecus. 



We have, then, an animal with a long thigh free from the body, a foot 

 capable of complete pronation and supination, and a form of lower jaw 

 and teeth quite similar to that of the lower monkeys. The form of the 

 humerus and its relative length to the femur are quite as marked as in some 

 of the lemurs. The most marked difference is seen in the increased num- 

 ber of teeth ; but in this point it relates itself to the other Quadrumana, 

 as the most ancient types of Carnivora and Ungulates do to the more 

 modern ; e.g., Hycenodon to the former and Palceosyops to the latter. In 

 its special dental characters it shows a close resemblance to small types of 

 the Eocene, which have been regarded as low Perissodactyles, as Ilyo- 

 psodus, etc. 



TOMITHERIUM ROSTRATTJM. Cope. 



Proceedings of the American Philosophical Society, 1872, p. 470. - 

 This species was about the size of the prehensile tailed-monkey, so 

 frequently seen in shows. The first and second premolar have but one 

 root, the base of the second being about the size of the base of the canine. 

 The latter are cylindric at base. The incisors form a parabolic outline, 

 and have entire edges, the middle pair transverse ones. Enamel gener- 

 ally smooth, premolars somewhat striate ; an indistinct inner cingulum. 



M. 



Length of entire dental series (straight) 0.044 



" symphysis mandibuli 020 



Depth ramus at second molar 010 



Length crown of " " 006 



Width " " " 0045 



" between two " " 014 



" " canines 005 



" of ascending ramus above dent, foramen 016 



Length of humerus 083 



Diameter of head 013 



Diameter of shaft at middle 0.0085 



" " distal end, transverse 023 



" " " antero-posterior 0078 



Depth of olecranon 009 



" " ulna at coronoid 010 



Diameter extremity of radius, proximally 009 



" " " distally 010 



Length of ilium from acetabulum 042 



Width near crest 017 



Length of femur preserved 137 



