~1872.] 355 [Cepe. 
Anogmius, the sides of the centra, though lacking the grooves of other 
genera, are striate-grooved and reticulate. So are those of Ischyrhiza, 
and both in this resemble the recent genus Hsox. Add to this the fact 
that the teeth of Ischyrhiza are almost exactly like those of Hsox, espe- 
cially as to their large fissured fangs, and half pleurodont insertion, some 
relationship to the Hsoeidw may be predicated. This is the first hint I 
know of as to the affinities of Ischyrhiza. 
Anogmnius contractus was about the size of Ichthyodecies prognathus; 
the second Anogimius is not more than one-third the size, the caudal ver- 
tebres are more aggregated, and the neural spines after leaning backwards 
are turned upwards. The specimen came from Lower Butte Creek ; no 
parts of cranium or fins were found. The vertebrae originally described 
by me as pertaining to Ichthyodectes etenodon belong either here or to 
Ischyrhiza; they agree with the latter in most respects, having the neuro- 
pophyses codéssified with the centrum. They are several times larger 
than those of A. contractus and relatively shorter, being about equal to 
those of Ischyrhiza mira, Leidy. 
I do not name these species, as they may be Pachyrhizodontide, and 
will be in any case better identified from cranial and fin remains. 
SELACHII. 
Remains of sharks and rays are far less abundant in the cretaceous of 
Western Kansas than in New Jersey, and are much exceeded in abund- 
ance by the Physostomus Actinopteri, as the present account indicates. 
In the region near Fort Hays and Salina, sharks’ teeth are more fre- 
quently found. Those from near Fort Wallace belong to but two species 
of the genus. 
GALEOCERDO. Mill. Henl. 
GALEOCERDO CRASSIDENS. Cope. sp. nov. 
Established on two teeth of the type of G. aduncus, Agass., 7. ¢., with 
one cutting edge much more convex than the other. The processes of 
the fang are rather narrow, that beneath the convex cutting edge the 
most so. The apex of the tooth is very short, entirely plane, and stands 
over the middle or inner edge of the wider process of the fang. The 
shorter cutting edge is straight or convex to near the base, where a short 
divergent keel develops itself. The anterior edge is strongly convex, and 
all the edges are denticulate. One side is more convex than the other. 
No denticles. Cementum smooth. 
M. 
Length basis........ fates ie He alive 0.014 
Height crown....... SEOs sate oe dae Sisal hls een Ot 
TOON one ve scmes AP ee eee a Payee sth Ree) .005 
Width tooth at contraction.....-- ae BRB Bel eae FRCS Te 
GALEOCERDO HARTWELLII. Cope. sp. nov. : 
This species is of the edgertonti group, ¢. ¢., with the cutting edges 
» sub-equal and symmetrical. The basis is broad and with convexities of 
