40 THE NAUTILUS. 



A MOLLUSK HUNT IN WYOMING 



BY JUNIUS HENDERSON. 



The recent molluscan fauna of Wyoming is probably less 

 known than that of any other state in the Union. A number 

 of mountain chains, more or less isolated by broad expanses of 

 plains unfavorable to land snails, promise interesting results 

 from a conchological exploration of the region, especially with 

 reference to the genus Oreohelix. I have long looked in that 

 direction with covetous eyes. In 1917 it was my privilege to 

 spend the two weeks from August 28 to September 7 in that 

 region, in company with Edward L. Schwabe. We traveled 

 hastily by auto, with camp outfit, passing almost entirely across 

 the state from south to north. The great distance traveled, 

 together with long stretches of barren territory between collect- 

 ing places, and the lack of opportunity for side trips into more 

 favorable territory, prevented great results, but we obtained an 

 acquaintance with the region that will be invaluable in planning 

 another and longer season's work in the future. Unfortunately 

 the war conditions have prevented a continuance of the work 

 during the present year. Dr. H. A. Pilsbry has rendered val- 

 ued assistance in the determination of some of the land shells, 

 and Dr. Bryant Walker has identified or confirmed the identity 

 of most of the fresh-water snails. The Pmdia, of which we 

 found very few, were submitted to Dr. V. Sterki some time ago, 

 but as yet I have no report from him. In the card index of 

 the University of Colorado Museum, I find noted the published 

 records of the following species and subspecies for Wyoming: 



Columella alticola (Ing.) 

 Euconulus fitlvus alaskensis Pils. 

 Lymnaa apicina Lea 

 Lymnaa binneyi Tryou 

 Lymncca- elodes var. ? 

 Lymncca jacksonensis Baker 

 Lymn&a- proximo Lea 

 Lymncea- traski Try on 

 Oreohelix cooperi (W. G. B.) 

 Oreohelix cooperi minor (Ckll.) 



