232 



Tlio restored craiiiuiu ui' iliis fish is about one foot to eighteen inches in 

 length. It is oi' hmceolate form, with a very wide gape of" iiioulh, which 

 opens terminally. Tiie entire length of the fish, estimated on the basis 

 of E. sctniancepa, would be ab(nit forty inches. 



Empo merrillii, Cope. 



Indicated l)y numerous portions of cranial Itones, including those sup- 

 porting the teeth.. On the proximal part of the premaxillary, tiie large teeth 

 grade into those of the small inner series insensil)ly ; at the distal end, the 

 two large ones of the inner side are opposite to the reduced ones of the outer 

 series. Both maxillary and mandibular teeth are striate-groovcd on the outer 

 side at the base. The tongne shaped pharyngeal bone is peculiar in not 

 being widely expanded at ane end, and in having a narrow basis generally for 

 the two rows of teeth it supports. The ? palatine bone exhibits the teeth en 

 brosse seen in E. semiunceps, but principally on one side, and the thickened 

 edge sup[)orts on one of its marginal angles a series of much larger conical 



teeth. 



Measurements. 



M. 



WiiUb of tlio iiiaxillaiy interiorly at the miiUllo 0. 012 



Depth of the maxillary distally 0.018 



Depth of the maxillary proximally 0. Oil 



Depth of the ? palatine 0.018 



Width of the tougiic-shaped bone at the uiiddlo 0. OOi) 



Niobrara epoch of Ellis County, Kansas. Dedicated to Professor Merrill, 

 of Topcka, who has made a number of important additions to our knowledge 

 of the extinct vertebrata of Kansas. 



Empo conteacta, Cope. 



Considerable portions of a cranium of a species of the lesser size of the 

 E. semianceps resemble corresponding parts of that species, with certain 

 marked exceptions. These are seen in the flatness of the maxillary bone, and 

 the large size of the inner row of teeth. The inner face of the premaxillary 

 is very narrow, by reason of the depression of fi)rm. The proximal end 

 of the same is, on the other hand, a little compressed. A single row of large 

 teeth occupies it, extending along the inner alveolar border. Those of the 

 outer row appear to Ije wanting f()r a considerable distance, and are at first 

 no larger than those of the inner. On the outer face, at the distal end, the 

 usual fossa on the upper half is wanting ; the face from the alveolus being 



