CLASSIFICATION OF THE THERTODONTIA. 



57 



trigeminal " fovaiiien " lies considerably forward and is more 

 dorsal in position. It lies at the end of a long slit and is pre- 

 snniably really only an incision an<l not a foramen. The length 



Text-tifi-nre 15. 



RO. Pt.Fr. 



LeptotracJieJns eupachygnatlms. Type-skull. 

 Right lateral aspect. X §. 



Text-fignre 16. 



%^ \ 



ForU. PBRli Fen.Ov, B.Oc. 



Jjejitotrachehis eupachygnatlms, Tj'pe-sikull. 



Lett lateral aspect of brain-case, the parts of the skull lateral to the post -temporal 

 fossa being removed as in text-fig. 10. 



of the slit is rendered nncertain by the fracture of the anterior^ 

 end of this part of the brain- case. In the part of the brain-case 

 preserved there is no evidence of the large venous foramen 



