' INSECTIVORA. 207 



has two lobes instead of one. I mention here that the loose tooth of the 

 E. acutidens, which I figure Plate XXIVa, figs. 17-1 7a, as a first superior 

 premolar, may not really be such, but may be a second superior incisor. 



From E. Msulcatus, which I discovered in the Wasatch region of New 

 Mexico, this species is separated by the much longer superior incisors and 

 smaller inferior second incisors. 



Part of the skeleton of a second specimen includes the superior pre- 

 maxillary bone with the second incisor of the right side; parts of the 

 mandible with three incisors and the posterior four molars; vertebrae 

 from various parts of the column; parts of the scapula humerus, manus, 

 pelvis, ribs, and fibula. The generic characters observable in this specimen 

 have been already recited. 



The atlas is characteristic. The transverse process is on the posterior 

 edge of the vertebra,- and its inferior edge is narrow. It is perforated from 

 before upwards and backwards by the vertebral canal. The lateral canal 

 pierces the neural arch at the middle of its external border. The anterior 

 border of the arch is notched medially. No neural spine. The axis is 

 quite robust and the neural arch is large. The neural spine is elevated and 

 has not an elongate base. The paradiapophysis is small. The inferior me- 

 dian line is keeled. The processus dentatus is constricted at the base above 

 by a groove; its superior face is quaquaversally convex. The posterior 

 articular face is wider than deep, and is oblique. A more posterior cervical 

 centrum has oblique transverse articular faces about as wide as the body is 

 long. The inferior face has a median keel with a concavity on each side. 

 The centra of two dorsals, an anterior and a posterior, are depressed. The 

 inferior median line is a flat band, which widens posteriorly. The two 

 venous foramina of the neural floor are large. The caudal vertebra asso- 

 ciated with the other specimens has no neural arch. It is very lai'ge, more 

 than twice as long as the longest dorsal and one half longer than the axis 

 with odontoid process. It has a ridge on each side, which terminates in a 

 short process posteriorly, and a median ridge below, which terminates behind 

 in a double tuberosity. If this vertebra belongs to this skeleton, the ani- 

 mal had an unusually long tail. 



