76 Annals of the Carnegie Museum. 



Family ANOPLOTHERIID^. 



A great surprise encountered in the study of the collection from the 

 Uinta Eocene made in 191 2 is the discovery of a genus, which repre- 

 sents the family Anoplotheriidce hitherto only known from the old 

 world. Only surface fragments were found, which are apparently 

 mixed with remains pertaining to other typical Uinta genera, but 

 enough has been brought together from the lot to certainly establish 

 the features, especially of the limb and foot structure, of an Ameri- 

 can anoplothere. There was found a second individual in the same 

 locality and horizon, which also consists of foot-bones and other frag- 

 ments of the skeleton. ^^ These fragmentary remains (especially those 

 of the limbs and feet) appear to agree most closely with the genus 

 Diplohiine of the European Tertiary. 



Genus Diplobunops gen. nov. 

 18. Diplobunops matthewi^^ gp ^ov. (Plate XXXVII). 



Type: Numerous fragments of the skeleton, C. M. No. 2974. 

 Paratype: Foot-bones and other fragments of the skeleton, C. M. 



No. 3394- 



Horizon: Uinta Eocene, Horizon C. 



Locality: Six miles east of Myton, Utah. 



Principal Characters obtained from the Type and Paratype: radius 

 and ulna short and stout; carpus and tarsus relatively low and broad; 

 articulation of proximal phalanges convex, distally carnivore-like; 

 unguals high, claw-like, compressed posteriorly and superiorly, and 

 suddenly expanded along the plantar border in front of the subungual 

 process; animals slightly smaller than Diplobune quercyi of Europe. 



The fragments of the skull and lower jaws which were found together 

 with the [Paratype of Diplobunops, C. M. No. 3394, are so nearly 

 similar to corresponding parts of other Uinta protoreodonts that it is 

 only provisionally that they are referred to the paratype of this new 

 genus. Indeed these skull and jaw fragments were first given a separ- 

 ate catalog number and referred to Protagriochcerus annectens Scott.^^ 

 A closer and more critical study of the specimen in connection with 

 Diplobune quercyi reveals two hypotheses: of which the first and most 

 probable is, that the remains of a new species of Protagriochcerus in 



'^ The fragments of the skull and lower jaws are provisionally referred here. 



5^ In recognition of Dr. W. D. Matthew. 



^' Trans. Wagner Free Institute of Science, Vol. VI, 1899, p. 100. 



