60 Annals of the Carnegie Museum. 



Incert^ Sedis. 



A fragmentary skeleton, C. M. No. 2386, from the upper B or lower 

 C of the Uinta sediments is provisionally referred to the family 

 MiacidcE. 



From the proportions of the fragments of the skull and from what 

 is known of the limb-bones, I should judge the animal to have had a 

 head in its proportions somewhat like Vulpavus, or possibly as small 

 as that of Palcearctonyx. The limb-bones are, however, not as robust 

 as in the latter, and more nearly suggest Vulpavus. The femur is 

 slightly longer than that of V. ovatns described by Matthew. The 

 illustration of the hind foot of V. projectus Matthew {I.e., p. 389, 

 Fig. 31) is quite suggestive of the remains of the hind foot of the 

 present specimen. The material very likely represents a species new 

 to science, but I refrain from proposing a name at the present time, 

 even though the specimen may be worthy of being named. 



Order RODENTIA {Glues). 

 Family ISCHYROMYID^ Alston. 

 Genus Paramys Leidy. 

 8. Paramys compressidens sp. nov. 



Type: Lower jaw with cheek-teeth. C. M. No. 2920. 

 Horizon: Uinta Eocene (Horizon C). 

 Locality: Six miles east of Myton, Utah. 



Characters of Type Specimen.^^ Smaller than P. rohnstns or P. 

 {Ischyrotomus) petersoni Matthew. Teeth narrower and jaw shallower 

 and slenderer than in P. robustus. A greater prominence and better 



definition of the connecting crest between the 

 two principal outer cusps of the molars than 

 in P. {Ischyrotomus) petersoni. 



' This species resembles P. robustus and 

 Fig. 3. Paramys compres- ,ti \ • • 1 



sidens. Carnegie Museum ^- i.i^chyrolomus) petersoni in the general 

 No. 2920. X i/i. smoothness of the cusps, the shallow me- 



dian valley, the absence of the external in- 

 termediate cusp, which is completely fused with the connecting loph, 

 and the relatively small size of the anterior outer cusp of P4' (Gidley). 



" Mr. James W. Gidley of the U. S. National Museum, Washington, D. C, has 

 kindly compared the Uinta Eocene rodent remains, published in this paper, with 

 type material from different institutions now (1916) in the National Miiseum under- 

 going a study preparatory to the forthcoming work on the Recent and Fossil 

 Rodents by Messrs. Gerritt S. Miller, Jr., and James W. Gidley. 



