204 University of Kansas Geological Survey. 



treniity. Just below this there is a prominent rugose knob, 

 with a deep pit under it entering from the external border. 



" In the cervical vertebrae, the outline of the articular faces is< 

 transverse cordate, the ball of the axis showing a marked differ- 

 ence in this respect from that of C.propython, where it is sub- 

 pentagonal. The centra of the anterior dorsals are elongate, 

 and much constricted behind the diapophyses. The cup here 

 becomes broader, and the emargination deeper. In the anterior 

 caudals the articular faces are a broad vertical oval. There are 

 eighty-one caudal vertebrae preserved, the last fifty being con- 

 tinuous. The terminal ones are less than one-twelfth of an inch 



in transverse diameter. 



Measurements . 



"Length of axis with odontoid process 39 mm. 



Width between diapophyses - 35 



Length of sixth cervical without ball 27 



Width of cup 18 



Distance from end of muzzle to center of first tooth 12 



North Fork of Smoky river." 



Clidastes liodontus. 



Clidastes liodontus Merriam, Ueber die Pyth. der. Kans.-Kreide, Pal., xli, 

 p. 35, 1895. 



"This species is represented in the Munich collection by the 

 nearly complete, though very fragmentary upper jaw, premax- 

 illary, and dentary. The premaxillary is drawn out into a sharp 

 point and possesses four teeth, which are rounded at their base 

 and which show anteriorly a tolerably strong, on the distal 

 third of the outer side a very weak carina. The maxillae have 

 the border for the premaxillary oblique as far as the fifth tooth. 

 The maxillary teeth, like those of the dentary, are rounded at 

 the base and compressed toward the apex, with a strong carina 

 anteriorly and a somewhat lateral one posteriorly. Toward the 

 hind end of the jaw the teeth are more strongly compressed and 

 at the end strongly so. All the teeth are quite smooth, and 

 may be compared with those of Liodon Owen, from which they 

 are scarcely or not at all different." 



The teeth are unknown in C. cineriarum and C. westii, either 

 of which may be the same. 



