278 



Enchodus PK'IROSUS, Cope. Plate LIV, ligs. -4,5. 



Ilayikni's liiilletin of the United States Geological Survey of tbo Territories, No. 2, [i. 44. 



Niobrara group ol' Kansas. 

 F^NCHODlis DOLICHUS, Copc. Plate LIV, fig. 7. 



Supra, p. '.^40. 



Niobrara Cretaceous of Kansas 



Enchodus oxytomus, Cope, sj). i/ov. 



Represented by one of the long teeth from the antei'ior exlremity ol' the 

 preuiaxillary or dentary bones. It differs from other species of the genus in 

 the extent to which the posterior cutting-edge is prolonged downward toward 

 the base of the tooth, nearly equaling in this respect the anterior edge. As 

 in all other Endiodl, the cutting-edges are not opposite, and a section of the 

 base is unsynnnetrical. Cemenluni mostly smooth. Crown ratlier broad for 

 its length, which is below the average of the Cretaceous species. 



Clays below Cretaceous, No. 4, New Jersey. 



Enchodus XEiKiEcus, Cope, sp. nor. 



Established on various teeth from the greensand of Delaware and New 

 Jersey. The elongate anterior (eeth are narrow and slender; the greatest 

 diameter at the base being at right angles to that of the u])per part of the 

 crown. The posterior side is, as usual, mucii more convex than the anterior, 

 and the two faces are separated by cutting-edges, both of which extend to 

 the base of the crown. A shallow groove runs just behind each cutting-edge 

 to the base, giving the latter an unsymmctrical fignre-8-form of section. Tiie 

 anterior face is but little convex, and is perfectly smooth ; the jsosterior is 

 very convex, and is marked with sharply defined grooves, about half-way to 

 the ajx'x from the l^ase, i)ctvveen the lateral shallow grooves. Fifteen may 

 be counted I'rom side to side. Length of crown, 0"'.030; median diameter, 

 0".005; l>asal diameter, 0"'.007. 



Cretaceous, No. 4, Delaware and New Jersey. 



Enchodus calliodon. Cope. 



/,. <■ , ]). :!r,4. \ 



Niobrara epoeh ot the Smoky Hill IJiver. 



