149 



The size of this roittili' was near that of Liodon validus. pfiliaps tliirtv- - 

 five to forty feet in length. 



The specimens on vvliich this species rests were discovered hy l^rof. B. 

 F. Mndgc, formerly State geologist of Kansas, now professor of geology in 

 tlie State Agricultural College of Kansas, on the north bank of the Smoky 

 Hill River, thirty miles east of Foi-t Wallace, Kansas. 



Numerous fragments of auollu^r larger individual were found by Professor 



Miulge near the same locality, which belong probably to tlie same species. 



Among them is a portion of the maxillary Ijone, will) ])ases of two teeth; the 



bases of the crowns wiiere broken olV are not com|)ressed, but slightly oval. 



A radius is a ilal lione. moic dilated al one extremity than that of Clidaskn 



pro])yt}ioii. 



Measvrtmentx. 



M. 



Lci)j;lh iil'tbo nuliiis ^- '0"^ 



Wiatli of tbr nuliiis at t-lu; niiriow extremity ''•"'"'* 



Width of till? riiiliiis ;it the wiilei' iixtieiuity O.OdO 



Wiiltbof thr iiulius nicilially ''•''■'- 



In addition to the two individuals proeure.l by Prof. B. F. Mudge, the 

 writer obtained a considerable part of a third from a low blufTon Fox Caflon, 

 soutli of Fort A¥allacc. This iiududes seventeen lumbar, dorsal, and cervical 

 vertebrae, including a.\is, with rii)s, and a large part of the cranium, with both 

 quadrates, occipital and periotic regions, etc. Its characters may be briefly 

 pointed out as follows : 



Articular surfaces of dorsal and cervical vertebrte transverse oval, exca- 

 vated above lor neural canal ; diapophyses not extending below to the edge 

 of the cup, hence not receiving an area of articular cartilage continuous with 

 the rim. Occipital crest low, oi)lique; quadrate bone larger; the meatus 

 depressed between ridges. A l)iitton of articular surface on posterior face 

 of hook. Scarcely any rudiment of zygosphen. Teeth small, ranch incurved, 

 faceted, and striale-ridged. 



Some characters, additional to those already derived from the first-known 

 examples, may be added. The mandible supports only twelve teeth. The 

 palatine bone is shorter anterior to the external process, and longer behind it 

 ihan'niH.coryphceus. In our specimen, the posterior extremity is broken 

 off, yet shows no indication of the (nnargination for the pterygoid bone an inch 

 behind the position of its anierior extremity in H. con/p/ueiis. There are ten 

 teeth on the part preserved, four in front of transverse process (six in H. 

 cori/phfEii.-i), and six (proij-^bly seven) Ix'hind (fix in H. cori/ph(eus). 



