7^ Bulletin American Museum of Natural History. [Vol. XIX, 



having nearly the whole of both the inner and the outer face 

 coarsely striated. The ridges and intervening furrows are 

 easily seen with the unaided eye, while in the case of K. 

 dolichus this requires a close observation. The striation 

 subsides close to the anterior very thin edge. As in E. 

 dolichus, the two faces are equally convex. The pterygoid 

 and the mandibular teeth are similarly marked by coarse 

 ridges and grooves. 



It is possible that this specimen is only an example of E. 

 dolichus with unusually coarse grooving of the teeth; but I 

 think that it is distinct. 



Fig. 57 represents the upper surface of the skull. The 

 more anterior portions of the frontals have left their impres- 

 sion on the matrix but are not rep- 

 ^^^ cp.o. resented in the drawing. From each 

 epiotic region a grooved ridge runs 

 forward to the prefrontal region. 

 From this ridge, at the centre of 

 growth of the frontal bone, a less 

 prominent ridge runs outward and 

 backward to the middle of the squa- 

 Fig. 57. Enchodus gladiolus mosal. Thc epiotics are prominent 

 JaTof'^k;ii!^'?;>.^.,^epiotic"''/" ^^^ ^^^ connected by a sharp ridge, 

 fteroti'c"'*'-^' ''"''""'"'= '^'•"' behind which the occiput drops off 

 steeply. The parietals are apparently 

 separated by the small supraoccipital. The parietals seem to 

 form a narrow band along the ridge connecting the epiotics. 

 The sutures are very indistinct. 



Enchodus saevus, sp. no v. 

 This species, which appears to be distinctly different from 

 any hitherto described, was collected near Elkader, Logan 

 County, Kansas, by Dr. W. D. Matthew, in 1897. The col- 

 lector regarded the beds as belonging to the Pierre formation ; 

 but Dr. Williston, who is familiar with the locality, informs 

 me that the deposits belong to the Niobrara. The species 

 has been a large one, as is indicated by the following measure- 

 ments: 



