﻿BOYSEN RESERVOIR VERTEBRATE FOSSILS — WHITE 203 



Table 2. — Species of fossil iiiammals identified from the Boysen Reservoir area 



Didelphodus ventanus 



Cynodontomys scottianus 



Cynodontomys Iimdeliusi, new species. 



Esthonyx acutidens 



Notharctus venticolus 



Teilhardella sp 



Loveina zephyri * 



Stylinodon cylindrifer 



Paramys major ' 



Paraniys inurinns i 



Prolimnocyon antiquus 



Sinopa st renua 



Didymictis altidens 



Vulpavus australis 



Miacis latidens ' 



Meniscotherium terrarubae 



Hyopsodus powellianus 



Hyopsodus wortmani 



Ilyracotheriiun venticohim 



Lambdotherium popoagicum 



Eotitanops borealis 



Heptodon brownorum 



Bunophorus etsagicus 



Diacodexis olseni 



Coryphodon sp 



Gray Bull 



Lysite 



Lost Cabin 



' Specimens referred provisioually to this species. 



action in poorly drained areas. These areas are just as hazardous to 

 motor vehicles when dry as when wet. Local areas of banded red and 

 greenish clays occur in several places in the Reservoir area, but are 

 usually not more than 50 or 60 acres in extent and grade laterally into 

 the drab-colored clays. Associated with the variegated beds there are 

 usually one or more zones of small calcareous nodules. Nearly all the 

 fossils collected were found in the areag of the banded clays and the 

 best preserved ones were in the nodular zones. The few fossils that 

 were found in the drab clays were usually so badly disintegrated by 

 crystallization of gypsum that they were not worth collecting. Neither 

 the field observations nor the study of the fauna give any indication of 

 a difference in stratigraphic level between the localities. Following is 

 a list of the localities, from which vertebrate fossils were obtained, 

 coded according to the practice of the Smithsonian River Basin 

 Surveys : 



48FR65. NE14SW14 sec. 5, T. 4 N., R. 6 E., of Wind River merid- 

 ian. Two prominent buttes, locally known as '\\niite Butte, or "Wliite 

 Hill, on the south side of Cottonwood (Dry Muddy) Creek at the junc- 

 tion of its valley with that of the Big Horn River. The sediments con- 

 sist of banded red and greenish clays with local concretionary zones, 

 and are fossiliferous throughout the thickness of the exposure. Prob- 

 ably some of the material collected by J. L. Wortman in 1880, 1891. 



