102 



AXOMODONTIA. 



Dorsal vertebrae with the capitular facet rising on to the arch, 

 which is coossified with the centrum ; terminal faces of latter deeply 

 cupped. 



Fig. 21. 



ias molaris.— a, palatal aspect of cranium ; b, do. of right ramus of 

 mandible ; c, lateral aspect of mandibular symphysis. From the reputed 

 Permian of Texas. ^. (After Cope.) 



Empedias molaris, Cope 1 . 



Syn. Diadectes molaris, Cope 2 . 

 Empedocles molaris, Cope 3 . 

 Empedias molaris, Cope 4 . 



Teeth ^J; upper ones with very wide crowns (fig. 21), the last 

 one being small ; inner and outer triturating surfaces of cheek-teeth 

 large and flat. Presphenoid with a median keel ; pterygoids wide. 



Hah. North America (Texas). 



R. 613. Part of the left maxilla, containing five posterior cheek- 



(Fig.) teeth, mostly imperfect; from the reputed Permian of 



Texas. The one entire tooth (fig. 20) is figured by 



Seeley in the ' Proc. Roy. Soc' vol. xliv. p. 137, fig. 4 



i Amer. Nat. vol. xii. p. 565 (1878). — Diadectes. 



3 Proc. Amer. Phil. Soc. vol. xix. p. 47 (1880). 



4 Ibid. pi. v. (1881), see note 4 on preceding page. 



2 Loc. cit. 



