106 



ANOMODONTIA. 



Genus NAOSAURUS, Cope \ 

 The neural spines of the dorsal and lumbar vertebrae enormously 

 elongated, with paired horizontal processes at intervals. Transverse 

 processes of dorsals large and prominent, no distinct capitular facet 

 on centrum, although all the ribs have double heads. In Dimetroclon, 

 Cope 2 , the horizontal processes of the neural spines of the vertebras 

 are absent. 



Naosaurus cruciger, Cope 3 . 

 The type species. The distal portions of the neural spines of the 

 vertebras cylindrical, and the distal horizontal processes represented 

 by tubercles. 



Naosaurus claviger. — Anterior aspect of a dorsal vertebra (partially restored) 

 from the reputed Permian of Texas. \. Ce, centrum. 

 (See Trans. Amer. Phil. Soc. vol. xvi. pi. iii. fig. 1, 1886.) 



Bab. North America (Texas). 



1 Amer. Nat. vol. xx. p. 545 (1886). 



2 Proc. Amer. Phil. Soc. vol. xvii. p. 512 (1878). 



3 Amer. Nat. loc. cit. 



