133 



pressed, least so anteriorly, and with a cutting-edge from base to crown as far 



as the fifth from the front ; in those anterior to that point, the posterior edge 



is discontinued. There are sixteen palatine teeth, which are smooth, and 



without anterior cutting-edge. The frontal hone has a low carina along the 



median line of its anterior portion. 



Vertebra of the cervical and anterior dorsal regions with round articular 



faces, not emarginate for the spinal cord. The bodies are elongate and 



somewhat contracted, and marked everywhere with finer and coarser striae. 



Hypapophyses prolonged on the cervicals ; the free one of the atlas with a 



j)rolonged keellike process. 



Meaiuremente. 



M. 



Length of tho axis witb tbo odontoid process 0.078 



Diameter of the ball of a cervical, vertical 0. 02U 



Diameter of the ball of tho same, trausverso 0. 026 



lixpause of the diapophj ses of tho same 0,084 



Len};tb of the centrum of the same 0. O.Vi 



Length of the maxillary bono 0. 3G1J 



Length of the ramus mandibuli behind the dentary 0.310 



Length of the promaxillary 0.040 



Total length of the cranium (2.33 feot) 0.713 



Length of tho pterygoid and palatine 0. 315 



Length of the centrum of the posterior dorsal vertebra 0.066 



Diameter of the ball, vertical 0. O.iy 



Diameter of the ball, transverse 0. 038 



The bones of this species are all light and slender. The elongation 

 of the vertebrae indicates that, if their number was of the usual amount, the 

 animal was of more than usually slender proportions. The position in which 

 it was found was a partial coil; the head occupying the inside of a turn of 

 the dorsal vertebra?. As compared with E. dispar and E. ve.lox of Marsh, the 

 present difi'ers in the lack of depression of the centra of the vertebrae, 

 especially the anterior, and in some details of structure of the quadrate bones, 

 as well as tiie larger number of teeth. 



Discovered in Fossil Spring Canon, in the gray limestone, by Martin 



Ilartwell and Sergeant William Gardner. But one specimen was found, which 



includes the greater part of the cranium, with the vertebra? as far as the 



lumbar region. 



Clidastes stenops. Cope. 



Indicated l)y a large part of the skeleton of one individual, and fragments 

 of two others. The first includes a large part of the cranium, willi l)()11i 

 quadrates, and fifty vertebra-, including the a.vis. The characters arc similar 



