lb KANSAS UNIVERSITY QUARTERLY. 



8, 189 1. A more complete description is here given, which, it is 

 believed, will be of service. The specimen is an unusually perfect 

 one, being very nearly complete, and, as now mounted, shows the 

 bones nearly all in the position in which they were found. The ver- 

 tebral column is continuous, except in one place, where the tail had 

 been bent up over the back ; and complete, save at the very tip of the 

 tail. The skull is complete, or very nearly complete, and has been 

 restored nearly to the condition in life. Figures have been made of 

 this portion of the skeleton, and will be given in a future communica- 

 tion. At present, it may be mentioned that the lacrymals are small, 

 roughly irregular bones, and pointed at either extremity. There are 

 no indications of transverse bones, as there are none in any other skull 

 in the collection. 



Cervical vertebrae. 



Atlas. The intercentrum is a small bone with three sides of nearly 

 equal extent. The two upper, articular surfaces are gently concave, and 

 meet in a rounded margin ; the inferior surface is convex, both an- 

 tero-posteriorly and transversely, with a roughened prominence in the 

 middle. The lateral pieces have indistinctly separated facets for 

 articulation with the odontoid, the intercentrum and the occipital 

 condyle. The rather short, flattened lamina extends upward, back- 

 ward and inward, approaching, but not reaching its fellow of the 

 opposite side; it is somewhat dilated distally. Directed outwards and 

 forwards, there is a stout styliform process. 



Axis. The neural spine of the axis is elongated antero-posteriorly. 

 It is thin on the anterior portion, but stouter and longer at the 

 posterior part. The large, stout odontoid process is united suturally, 

 as is also the well-developed atlantar hypapophysis, which forms the 

 anterior, inferior portion of the bone. The diapophyses are the 

 smallest of the costiferous series, with only a small articular facet for 

 the rib. The ball is strongly and evenly convex, with its greater 

 diameter transversely. The hypapophysis is the largest of the series; 

 it is suturally united with the stout, exogenous process of the centrum, 

 and projects downward and backward ; its distal extremity is rough- 

 ened for ligamentous attachments. 



The third cervical vertebra shows a well-developed zygosphenal 

 articulation, and stout articular processes. The transverse process is 

 small, only a little larger than that of the axis, though, unlike that, it 

 is strengthened by a ridge continued from the anterior zygapophyses. 

 The hypapophysis is smaller than that of the axis, but, like that, is 

 directed downward and backward. The spine may be distinguished 

 from that of any other vertebra by its stout, trihedral shape; it is 



