NO. 8 UPPER EOCENE ARTIODACTYLA — GAZIN 2$ 



Horizon and locality. — Uinta C, White River, Uinta Basin, Utah. 



Discussion. — Bunomeryx montanus is the type species and is 

 characterized by having its lower premolar teeth in a continuous se- 

 quence, without a diastema between Pg and P3. 



There is no indication in Wortman's paper as to the locality within 

 the Uinta Basin from which the type was obtained, but specimen 

 labels bear the information "White River" and "Level C." Three re- 

 ferred specimens in the collections of the U. S. National Museum were 

 found in the White River pocket to the south of the White River near 

 its junction with the Green River. This would indicate a level in the 

 upper part of Uinta B, showing that the vertical range is not restricted 

 to "C." Moreover, it seems probable that if the type is actually from 

 Uinta C the level represented is low. 



MEASUREMENTS IN MILLIMETERS OF DENTITION IN TYPE SPECIMEN OF 



Bunomeryx montanus, a.m. no. 2071 



Length of upper cheek tooth series, anterior margin of canine alveolus 



to posterior margin of M' 36.6a 



Length of upper cheek tooth series, anterior margin of alveolus for P* 



to posterior margin of M* 32.1 



Premolar series, anterior margin of alveolus for P^ to posterior margin 



of P' 17.8 



Molar series, M^-M', inclusive 14.7 



P*, anteroposterior diameter : transverse diameter* 4.9 : 3.9 



P*, anteroposterior diameter : transverse diameter 4.0 : 5.1 



M*, anteroposterior diameter : transverse diameter* 5.2 : 6.1 



M\ anteroposterior diameter : transverse diameter 5.1 : 6.9 



M^ anteroposterior diameter : transverse diameter 5.1 : 7.0 



Lower cheek teeth, P4-M3, inclusive 21.9 



Lower molar series, M1-M3, inclusive 16.9 



P4, anteroposterior length : greatest transverse width 5.2 : 3.0 



Ml, anteroposterior diameter : transverse diameter of talonid 4-8 : 3.3 



M2, anteroposterior diameter : transverse diameter of talonid 5-4 : 4-1 



Ma, anteroposterior diameter : transverse diameter of trigonid 6.8 : 3.9 



a, Approximate. 



* Measurements of posterior upper premolars are taken anteroposteriorly across outer por- 

 tion and transversely perpendicular to outer margin. Those of upper molars are taken 

 anteroposteriorly perpendicular to anterior margin and transversely across anterior portion 

 of tooth. 



BUNOMERYX ELEGANS ^ Wortman, 1898 



Type. — Palatal portion of skull with P--M^ of right and part of 

 left series, and both rami of mandible, right with P2-M3, A.M. 

 No. 2066A. 



Horizon and locality. — Uinta, White River, Uinta Basin, Utah. 



^ Illustrated in Wortman, 1895, fig. 2. 



