PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



hy the 



SMITHSONIAN INSTITUTION 



U.S. NATIONAL MUSEUM 

 Washington: 1934 



Vol. 83 No. 2976 



FOSSIL HARES FROM THE LATE PLIOCENE OF 

 SOUTHERN IDAHO 



By C. Lewis Gazin 



Assistant Curator-, Division of Vertebrate Paleontology, United States National 



Museum 



Among the fossil remains of late Pliocene mammals from lake 

 deposits near Hagerman in southern Idaho are a nmnber of speci- 

 mens representing leporid types. Three distinct species are recog- 

 nized, two of which are referred to the genus Hypolagus. The third 

 may represent Alilepus, a lagomorph previously known from the 

 Neocene of Asia, Comprising the material are a well-preserved 

 skull with the atlas and right ramus of the mandible associated, 

 four fragmentary jaws, an assortment of isolated teeth, and a few 

 limb bones. The greater part of the National Museum material was 

 collected by Elmer Cook, of Hagerman, from various localities south 

 of the Plesippus shoshonensis quarry, A few specimens, however, 

 including the Alilepus'i jaw, were encountered in the quarry during 

 operations there by Smithsonian Institution parties, 



A third species of Hypolagus is represented in collections made 

 by an expedition from the California Institute of Technology at a 

 locality near Grand View in southwestern Idaho, The fauna from 

 Grand View is not identical with that from Hagerman, and although 

 the difference may be attributed to the geographic separation of the 

 localities, it seems likely that the two are of slightly different age. 

 Presumably, the Grand View occurrence is of later date. The 

 Grand View lagomorph material was loaned to me for study through 

 the kindness of Dr. Chester Stock. 



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