WILLISTON: VERTEBRATE REMAINS FROM THE KANSAS PERMIAN. 55 
A single dorsal vertebra, and, perhaps, some phalanges, belong 
oD oD on] 
clearly in the genus C/epsydrops Cope, also originally described 
Fig. 4. Section of tooth, Cricotus. 
from Illinois, and are closely allied to the typical species. In its 
description I follow Cope’s language in the paper first cited for a 
dorsal centrum: ‘It is deeply bi-concave, the articular cavities be- 
‘ ing funnel-shaped and continuous, thus perforating the entire length 
of the centrum. * * The cavities communicate by a very small 
orifice. In an anterior dorsal the anterior cavity is as widely ex- 
cavated at the border as the posterior funnel. Another peculiarity 
is the absence of processes of the centrum, and a small capitular 
articulation is seen sessile on the border of the cup of two of the 
dorsals. The dorsal vertebre have their sides somewhat con- 
tracted; in one specimen the inferior face is longitudinally acute. 
In this dorsal the floor of the neural canal is interrupted by a deep 
fissure; which has a triangular shape with the apex downward, 
when seen in profile. The diapophysis does not project far beyond 
the base of the neural arch.” It is sessile with an elongated cup- 
j ped articular surface. 
i The phalanges are of more slender form than those of Crécotus 
The shaft is depressed and the distal condyle is not emarginate. 
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