356 Notices of Memoirs — G. A. Boulenger — Triassic Eejjtiiia, 



that of Syperodapedon, is not broader and hardly more massive than 

 that of SpJienodon, from which it differs, however, very much in 

 shape. The rostrum has quite a different direction from either of 

 these skulls ; the tusk-like premaxillaries, instead of being bent 

 downwards into recurved processes, are directed forwards in a 

 gradual slope from the frontal region to their extremities, which 

 project beyond the turned-up extremities of the mandibular rami. 

 This is practically the reverse of the condition in HyperodapedoUf 

 where the strongly curved premaxillary ' tusks ' are received 

 between the outwardly directed rostral processes of the mandible^ 

 Nasal bones are absent. 



Fig. 2. — Dorsal aspect of skull of Stcnometopon Taylori, gen. et sp. nov. 



y. jugal; m. maxilla ; p. parietal ; pm. preinaxilla; por. post-orbital ; p)rf. prefrontal; 



[2^111. premaxilla ; 2Jtf. post-frontal ; qj. quadrato-jugal ; sq. squamosal. 



