380 University Geological Survey of Kansas. 



ossified in the specimen. They are somewhat triangular in out- 

 line and meet each other in the median line, thus separating 

 the supraoccipitals from the frontals. They do not seem to 

 possess any very characteristic markings. The pterotics (?) 

 are prominent processes of bone that project outward from the 

 parietals and join the exoccipitals below. The supraoccipitals 

 do not seem to be present in this specimen, but are probably 

 not raised into a crest. The exoccipitals are rather large bones 

 projecting upward and outward from the basioccipital and form 

 a large portion of the back part of the skull. Each sends a fan- 

 like process of bone backward. There is still another long, flat 

 bone not connected with the rest of the skull that may repre- 

 sent a portion of the hyomandibular or an opercular. It is 

 somewhat irregular in outline and presents a sharp longitudinal 

 ridge near one of the borders. Measurements of skull are : 



Distance from supraoccipital to anterior extremity of frontals, *166 mm. 



Transverse distance across pterotics 65 " 



Greatest transverse distance across frontals 60 " 



Just back of the skull there is a bone that is no doubt con- 

 nected in some way with the vertebral column. It somewhat 

 resembles a terminal caudal vertebra or urostyle. It is con- 

 tracted and convex at one extremity and expanded and deeply 

 concave at the other. Near the center of the convex end there 

 is a foramina leading inward which probably continues through 

 to the other side. 



EMPO Cope. 



This genus is represented in the museum by the remains of 

 several individuals, more or less perfect, from the Niobrara 

 Cretaceous and a portion of one specimen from the Fort Pierre 

 of Kansas. It is probable that they include four species. 



The palatines are much elongated and bear two rows of teeth 

 on the anterior portion, of which the external are large and the 

 internal somewhat smaller. The ethmoid is contracted into a 

 rather sharp beak anteriorly and bears a number of small teeth 

 on the median line below, which are either arranged in one or 

 two rows or form a small cluster near the anterior extremity. 



* Estimated. 



