Number 29. JrxK 6, 1916. 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan. Published by the University. 



THE MOLLl'SCA COLLECTED IX X( )RTLIEASTERN 



XEX'ADA F.Y THE WALKER-NEWCOMB EXPE- 



DrriOX OF THE UXIVERSITY OF AHCHIGAN. 



By Bryant Waeker. 



The A\'alkcr-Xe\vc()inl) I'.xpcdilion of the University of 

 ]Michij;an spent a [)ortion of the snmmer of ]()12 in north- 

 eastern Xcvada. The area stndied was ahout the town of 

 CarHn. X"^evada. in the western part of Elko County and the 

 northern part of Eureka County. It Hes in the Lahontan Area 

 of tlie Great Basin. The topography and physical charac- 

 teristics have been given in detail by Ruthven and Gaige in 

 their report upon the reptiles and amphibians collected by the 

 expedition (Occ. Papers, Alus. Zool, L'. of I\L, X^o. 8) and 

 may be briefly summarized as follows : 



The region includes a broad in-filled valley called the Mag"- 

 gie I'asin and the sides of the Cortez, Seetoya, River and 



Scientific Papers of the University of Michigan No. 30. 



