and about as long as wide. The nenrapophysis appears to haA r e 

 been united by suture, although this point is not so clear as de- 

 sirable, and the bases of thediapophysis are very stout, extending 

 the entire length of the upper half of the lateral surface of the 

 centrum. Of the articular faces, one is much more concave than 

 the other. Length of centrum, m. .05; width, .057 ; depth, .055. 

 The crocodilian remains consist of a portion of a jaw bone with 

 alveoli for four teeth, of a broken vertebra, and a number of dermal- 

 scuta and fragments of other bones. At another locality not far 

 distant, were found numerous remains of saurian bones, embracing 

 dermal and cranial pieces, coprolites, a fragmentary tooth, etc., 

 which may have some affinity to these. The species indicated by 

 the former may be named and described as follows : — 



Ttpothorax coccinartjm, Cope, genus et species nova. 



Character genericus. The fragment of jaw belonging to this 

 genus is probably maxillary in position, for the following reasons: 

 the interior face of the bone is sutural, and for the most part solid. 

 This would refer it to the position of the symphyseal portion of 

 the dentary bone of % gavial-like form, but for other considerations. 

 Supposing the piece to be dentary, and the suture therefore verti- 

 cal, the incongruity follows that the alveolar face becomes very 

 steep, so much, so as to prevent the interlocking of the teeth, 

 which become lateral in position. If, however, the jaw fragment 

 be reversed in position, and the alveolar face placed in a horizon- 

 tal position, the suture of the inner side forms a sharp angle with 

 the vertical plane, as it should on the supposition of its being the 

 maxillary bone. The wedged-shaped section necessary to fill the 

 space between it and the median plane, will then be that of the pro- 

 longed posterior spine of the premaxillary bone. The solidity of 

 this portion of the muzzle is inconsistent with the gavial genera of 

 the Jura and later times, but not with the structure of the triassic 

 Belodons. The posterior part of the inner face is, however, strongly 

 excavated, and the sutural margin exhibits an outward deflection, 

 which is either the boundary of the nostril, or the suture for the 

 apex of the prefrontal or nasal bone. In either case the nasal 

 cavity and the nostril are posterior in position in conformity with 

 the structure of the " thecodont" crocodilia. The alveoli are large 

 and arranged in a curved line, one of them somewhat exterior in 

 position and isolated by a short diastema like a canine. Surface 

 of the bone pitted. The dermal scuta found close to the jaw frag- 

 ment, have a flat upper surface marked with shallow pits rather 

 closely placed, having resemblance to an obsolete Trionyx sculp- 

 ture. JS T ear one of the margins of the bone, the pits run out in 

 shallow grooves. A portion of a vertebral centrum found with 

 the jaw exhibits one articular face ; this is shallow, concave, of the 

 type of the Amphicoelian division of crocodilia. The body of the 

 centrum is much compressed. 



