358 University of Kansas Geological Survey. 



given by Lydekker. Like that, it has free nasals ; the ptery- 

 goids narrow and emarginate, the palatines probably meeting 

 in the middle line ; the prefrontals separated ; the jugal continu- 

 ing the line of the alveolar border to the quadrate ; mandible 

 with the interdentary suture obliterated, and with a prominent 

 oral margin. From it there seem to be ample generic differ- 

 ences. There are no indications of epidermal shields in the 

 present skull. 



Cervical Vertebrse. 



The specimen, as I received it, showed crowded into the pos- 

 terior temporal opening three cervical vertebras. With much 

 labor one of these has been removed ; it presents important 

 characters, all distinctly Pleurodiran. The anterior surface of 

 the centrum is markedly convex, but much broader from side 

 to side than from above downward, being subtriangular in 

 shape. The posterior zygapophyses are elongated and evi- 

 dently arched downward. The arch above is gently convex. 

 Near the posterior part of the centrum on each side is a very 

 stout transverse process. The posterior articular surface of the 

 centrum has been injured, but is convex. 



The measurements of this vertebra are as follows : 



Length of centrum from rim to rim 26 mm - 



Width of anterior articular surface 26 



Vertical diameter of the same 15 



Width through transverse processes 64 



Thickness of transverse processes 17 



Diameter of neural canal, transverse 13 



Diameter of neural canal, vertical 14 



Caudal Vertebrae. 



Several caudal vertebrae are preserved, one of the largest of 

 which is shown in pi. lxxviii, f. 4. They are all small, and in- 

 dicate a small and short tail. The centrum is moderately 

 elongated, with well-developed zygapophyses and rudimentary 

 transverse processes. The anterior end of the centrum is con- 

 cave, the posterior convex. Its measurements are as follows : 



Length of centrum 17 mm. 



Height of vertebra 22 



Vertical diameter of cup 12 



