from the O.il'ofd dnj of Ptterhormigh. 127 



ami rather resenihlti.s the hunu'iii.s i)f Mui<vnosaui'us, Tin; 

 iiuiiiis iiiul uhia are hir^e hikI arc longer than wide; thi-y 

 eiirh)se a lar^c oval openitiii; Ix'twcon tlicm. 



The pelvis {i\<^. •») and hind linih, as in other members of 

 the family, are very hiri^c. The piihes are very hirge thin 

 phite.s of bono, the anterior ends of which are broailly rounded ; 

 ill the middle line they meet in a suture. The posterior 

 borders are concave, forming the anterior boundaries of the 

 obturator openings. The outer borders in front of the glenoid 

 surfaces are also slightly concave. The ischia, as in the 

 other iiKMubers of the taniily, are greatly elongated ; in the 

 middle line they meet in a long suture ; their liin ler extre- 

 mities are rounded and the outer borders gently concave. 

 The anterior edges are concave and form the hinder borders 

 of the obturator foramina. The head bears three facets, the 

 posterior one for tlie ilium, the middle one forming the 

 middle part of tlie acetahiilum, the anterior uniting with the 

 pubis. The ilium is much crushed in the type s{)L'cimen, but 

 it seems to have been considerably expanded both at its upper 

 and lower ends. The femur is larger than the humerm, and, 

 like if, is expanded distally to a degree not seen in Pliosaurus 

 and Peloneustes. The {)Osterior border of the shaft bears 

 deep grooves and strong ridges for the attachment, of muscles; 

 the trochanter is well developed. There was an aruMur of 

 ventral libs, but these are not well preserved. 

 Only one species is at present known. 



iSimolestes vora.v, sp. n. 



Ti/pe specimen, — The greater part of a skeleton, inelu<ling 

 skull (lig. 7), mandihle (tig. 4), vertebral column (much 

 crushed), pectoral girdle (tig. 5), and parts of the tore paddles, 

 pelvic girdle (tig. G), and parts of hind paddles ; some ventral 

 ribs. (U. 3319.) 



In this specimen the characters given above in the definition 

 of the genus are well shown. The skull is much crushed, the 

 posterior part being im{)erfect, while the anterior portion has 

 been forced down upon the mandible, so that the points of some 

 of the mandibular teeth completely pierce it. The maxillo- 

 premaxillary suture appears to run in behind the fifth or sixth 

 looth, and the facial processes of the premaxillie extend back 

 abnut as far as the anterior border of the orbits, where they 

 join the trontals. External to the premaxillaj and frontals at 

 tluir junction is a distinct bone, which may be the prefrontal. 

 The quadrates are Very large and the articuhttion for the 

 lower jaw very wiile. In the mandible there are six teeth in 



30* 



