REPTILIA : NOTHODON 17 



the present species the first and last of the transverse teeth are smaller than the 

 middle ones. The legs were short, the long bones had their extremities covered 

 with cartilage, but the carpals and the tarsals were well ossified. The centra 

 were very deeply concave, and the tail was long. 



The following measurements are taken from the type specimen of this 

 species: 



Length of maxillary bone 65 mm. 



Space occupied by ten maxillary teeth 55 



Height of crown of second maxillary tooth 14 



Height of crown of third maxillary tooth 9 



Antero-posterior diameter 3 



Transverse diameter 8 



Antero-posterior diameter of eighth tooth 5 



Transverse diameter 15 



The present species was about five or six feet in length, and herbivorous in 

 habit. It was apparently slow in movement, and probably more or less 

 aquatic. The remains at present known are from New Mexico. 



Among the material from the Baldwin bone-bed of New Mexico 

 in the Yale Museum which had been received at the time the 

 above description was written, I find evidence of three individuals 

 pertaining to this species, including the type specimen as figured; 

 fragmentary remains of mandibles; the nearly complete upper part 

 of two skulls, and an additional frontal bone; radius, ulna, tibia, 

 and fibula. The skull bones were widely separated and scattered, 

 and none of the bones had been mended. Whether or not the 

 animal had a long tail it is even yet impossible to say from the 

 specimens, as no two bones are in relation with each other. 



Among the material acquired later there are evidences of addi- 

 tional skulls, but with the scattered and incomplete remains of 

 them little can be done. Had the material been collected with 

 modern care, there is little doubt that from among it almost perfect 

 skulls might have been reconstructed, of especial value from the 

 fact that the bones are free from matrix, undistorted, and separated 

 at their sutures, with few exceptions. Two have been partially 

 restored, showing nearly the whole of the upper surface. 



The superior surface of the skull is roughened throughout 

 (Plate XXXVIII), save the supraoccipital region, with small 

 punctulations and deep, pitlike or groovelike excavations, espe- 

 cially conspicuous over the parietal and frontal bones. From near 



