21872.] : [Cope 
inner side of the basis of the tooth. The absorption commencing at this 
point no doubt removes the bases so that the crown falls away. 
The name used was applied by Dr. Leidy to a fish erroneously referred 
by Agassiz and Dixon to Sawrodon, Hays. He did not characterize it, 
and until the barbed palatine teeth characteristic of it are discovered in 
our species, their reference to it will not be fully established. In the 
parts preserved they appear to be identical. ; 
The general affinities of the genus will receive new light from materials 
now in my possession and not yet developed. 
The Sphryiena carinata, Cope (Hayden’s Rept. Wyoming, etc., p. 424), 
probably belongs to Cimolichthys. 
CIMOLICHTHYS SULCATUS. Cope. sp. Noy. 
Indicated by a left dentary bone with attached parts of angular, etc. 
The fragment supports thirteen teeth at equal distances, the intervals 
often presenting traces of tooth bases. The bases of the teeth are round 
and the crowns become compressed to the tip. They are strongly curved 
backwards and acute: The anterior margin is particularly convex and 
acute, forming a cutting edge, but there is no edge on the posterior face. 
The surface is rather finely striate-grooved on the inner and posterior 
faces. The teeth of the exterior series are in several rows, that next the 
large teeth being considerably larger than the others. They are curved 
inwards and are flattened, having cutting edges on both anterior and 
posterior margins. Cementum smooth. The external smaller teeth are 
shorter in relation to their length, not curved, and two-edged. 
The dentary bone contracts irregularly to the symphysis, and has a 
thickened inferior margin. The symphyseal surface is small, and pre- 
sents a marked fossa, The external face of the bone is divided by a deep 
longitudinal groove which is overhung by the produced extremity, and 
which gives exit to the mental foramen. The external face of the den- 
tary has an impressed groove along its lower third anteriorly, and its 
surface is sculptured with deep longitudinal sulci, which often run 
together. 
ogether af 
Length of fragment. ....... eee eee eee eee eee eee Coes 0.18 
Depth of first tooth....... siiiae us Sarai eaigd waist eee aU 
Ce. Seventh “GU akates Geos ts les a aca vie -028 
¢. *bentbid, “cihiws fae get oi ik LTO CR 045 
Total elevation of fifth tooth......... linniionh will anole 
The restored cranium of this fish is about one foot in length. 
From near the Smoky River in Western Kansas. 
CIMOLICHTHYS SEMIANCEPS. Cope. sp. nov. 
Established on remains of two individuals. One of these embraces 
vertebrae, portions of vomer, maxillary, mandibular and other bones with 
some scales. The other consists of a dentary bone with symphysis and 
teeth, 
