108 ANOMODONTIA. 



R. 564 c. Fragment of the spine of a vertebra, showing the base of 

 a horizontal process ; from Texas. Purchased, 1885. 



Specifically undetermined specimens. 

 R. 576 a. An imperfect dorsal vertebra ; from the reputed Permian 

 of Texas. Only the proximal portion of the neural spine 

 remains, the zygapophyses are imperfect, the transverse 

 processes broken off, and the margins of the terminal cups 

 of the centrum damaged. As in No. R. 564 a, the neural 

 spine is inclined backwards, instead of forwards as in Cope's 

 figures. Purchased, 1885. 



R. 576 b. Portion of the neural spine of a vertebra ; from Texas. 



Purchased, 1885. 



R. 564 d. Fragment of a neural spine ; from Texas. 



Purchased, 1885. 



R. 564 e. Part of a neural spine, with the bases of the horizontal 

 processes ; from Texas. Purchased, 1885. 



Genus EMBOLOPHORUS, Cope 1 . 



Known by vertebras, in which the neural arches are coossified 

 with the .centra, and each dorsal intercentrum carries a facet on 

 either side for the articulation of the capitulum of the rib. The 

 dorsal centra have cylindroidal and deeply cupped terminal faces, 

 and a compressed median portion with a sharp haemal carina ; the 

 transverse processes being short. The height of the neural spine 

 appears to be unknown. 



The intercentra project beyond the edges of the centra. 



Embolophorus, sp. 



The following specimens indicate a species of much larger size than 

 the typical E. fritillus, Cope 2 , in which the length of the vertebral 

 centrum is given as 0,004. In the present specimens the length of 

 the centrum reaches 0,025 ; and these vertebras agree in absolute 

 size with the half-sized figures of E. doll over ianus given by Cope in 

 the ' Proc. Amer. Phil. Soc' voLxxii. pi. i. fig. 4. 



Bah. North America (Texas). 



■R. 569 x. Two somewhat imperfect dorsal vertebras and an interven- 

 ing intercentrum; from the reputed Permian of Texas. 



1 Proc. Amer. Phil. Sac. vol. xvii. p. 518 (1878). 2 Loo. cit. 



