104 ANOMODONTIA. 



Empedias phase olimis, Cope \ 



Syn. Diadectes phaseolinus, Cope 2 . 

 Empedias phaseolinus, Cope 3 . 



Upper cheek-teeth 16 in number, with narrower crowns than in 

 E. molaris, the last one small. Presphenoid flat ; pterygoids narrow. 

 Hab. Texas. 



R. 575. Fragment of a left maxilla probably belonging to this 

 species ; from the reputed Permian of Texas. This speci- 

 men shows the broken bases of three cheek-teeth, the 

 largest of which has a transverse diameter of 0,0145, or 

 nearly the same as in the type specimen. 



Purchased, 1885. 



Genus DIADECTES, Cope \ 



The type genus. Distinguished from Empedias by the presence 

 of a distinct tusk separating the incisive from the cheek-teeth, and 

 of a fossa in the alveolar border of the jaw at the inner extremity of 

 each cheek-tooth. The outer alveolar border of the maxilla diverges 

 from the line of the tooth-series backwardly and outwardly, which 

 is not generally the case in Empedias. 



Diadectes sideropelicus, Cope 5 . 

 The type and only described species. 

 Hab. North America (Texas). 



R. 575 a. Part of the left maxilla ; from the reputed Permian of 

 Texas. The broken bases of four cheek-teeth are shown, 

 with the fossa in the jaw at the inner extremity of each. 

 The backward divergence of the outer side of the alveolar 

 border is also shown. The largest tooth has a transverse 

 diameter of 0,012, as in the type. Purchased, 1885. 



R. 575 b. A smaller fragment of a jaw showing the bases of two 

 teeth ; from Texas. Purchased, 1885. 



Family CLEPSYDROPID.E. 



Dentition of a carnivorous type, and teeth present on the pala- 

 tines and pterygoids ; marginal teeth, although frequently having 

 one or more enlarged tusks, not differentiated into the three regular 



1 Proo. Amer. Phil. Soc. vol. xix. p. 46 (1880). — Diadectes. 



2 Log. cit. 3 Ibid. vol. xx. p. 635 (1883). 

 4 Ibid. vol. xvii. p. 505 (1878). 5 Loo. cit. 



