Oya) 
Cope.] 352 [Jan. 5, . 
These indicate smaller individuals than that typical of C. sulcatus, but 
the principal difference is to be seen in the teeth. These are rather more 
elongate, and they have a cutting edge on the posterior aspect of the - 
apex as well as on the anterior. It extends but a short distance while 
the anterior rises near the base, and is strongly convex. The tooth curves : 
backwards; the base is round in section. The convex posterior and 
the inner faces are rather finely striate-grooved. The larger teeth of the 
external series are convex on the inner face ; they are two-edged, and 
slightly incurved. 
The outer face of the dentary bones is strongly longitudinally parallel 
suleate. The inner face and the surfaces of all the other bones are minutely 
striate exactly asin some of the Mosasuuroids, Clidastes propython, for 
example. The anterior extremity of the muazllary is straight on one 
side, and obliquely beveled on the other to an obtuse compressed apex. 
The bevel becomes sub-horizontal posteriorly, indicating a rather shallow 
bone. Two of its anterior teeth are a little larger than those that follow. 
The supposed vomer is narrowed to a beak posteriorly (2), and presents an 
elevated longitudinal and obtuse ridge on the middle line. This supports 
a row of nine teeth, five of them having mates. The bone expands at 
the other end for a squamosal articulation with other elements. The 
vomerine teeth are smaller than the larger dentaries. 
The vertebre are elongate and much contracted medially ; the rims of 
the cups are thickened, and the cups themselves very deep. There is a 
trace of a single median longitudinal groove. The neural and hamal 
arches are represented by broad longitudinal lamina in the specimens. 
The vertebra are thus very different from those of the Saurodontida, and 
bear more resemblance to those of Cyprinodontide. 
In the ramus with symphysis, the characters of the latter resemble 
those in (. sulcatus. It is very small, and does not exhibit the fossa of 
the latter species. The mental foramen does not continue as a groove to 
the edge, while there is a deep groove on the inner face opposite to it, not 
seen in O. sulcatus. 
The first described specimen would have been, perhaps, a twenty-five 
pound fish in life. Both specimens were from near Butte Creek, at some 
distance apart. 
CIMOLICHTHYS ANCHPS, Cope. sp. nov. 
Established on portions of a right maxillary bone of one individual, 
and, perhaps, the premaxillary of a second. The former supports six 
teeth and four empty alveoli. 
In accordance with characters derived from study of OC. semianceps, 
there is no external series of smaller teeth on the maxillary. The maxil-- 
lary has a flattened anterior extermination, somewhat as in Stratodus 
apieatis, the superior face being excavated and widened and gradually 
descending to meet the inferior. The line of junction, where also the 
premaxillary commences, is oblique from before inwards, and backwards. 
The anterior tooth is a little larger than those following. The form of. 
