66 PROCEEDINGS OF THE ACADEMY OF [Feb.^ 



originally assumed from shell characters alone, while the anatomy of 

 rugosa connects it with the coojieri group. 



While in this district we discovered that our 0. peripherica stations 

 4 and 36, 1915, are on opposite sides of the same small mountain. 

 We were misled before by the fact that Daniels had approached his 

 Sta. 4 from one direction, while we had together at a later date 

 approached Sta. 36 from another direction. 



Deweyville, Utah. 



Deweyville Postoffice is in Box Elder County, Utah, fifteen mile& 

 north of Brigham. Some confusion is likely to arise from the fact 

 that the railroads, both steam and electric, passing through the 

 town, have abbreviated the name to Dewey, though some maps and 

 gazetteers locate a Dewey post village in Grand County. Specimens 

 of Oreohelix collected and labelled by Hemphill, in the collection of 

 Mr. Daniels, bear the locality label, ''Dewey, Box Elder Co., Utah," 

 and are designated as utahensis. Specimens in the Hemphill col- 

 lection in the cabinet of Mrs. Ida S. Oldroyd, and others placed by 

 her in the University of Colorado ^Museum, were labelled by Hemp- 

 hill: " Smooth variety of hinneyi, passing into albida. Dewey, 

 Utah. Large." Another lot, designated by him as "var. albida," 

 is from "Collinston, Utah," Avhich is about five miles north of- 

 Deweyville, and three lots labelled albida by him are from Logan, 

 according to the labels. A careful examination of this material 

 under a lens convinces us that it is identical with the smooth form 

 of 0. h. hybrida from Sta. 102, which grades so completely into 

 typical hybrida that we cannot consider it entitled to a separate 

 name, even as a "form." 



Sta. 102, mouth of first gulch northeast of Deweyville. Oreohelix 

 haydeni hybrida (Hemph.), periphery quite rounded and spiral 

 sculpture obscure in most examples, common under wild cherrj^ and 

 mountain maple overhanging limestone slides composed chiefly of 

 small fragments. Vitrina alaskana Dall common. 



Sta. 103, next gulch south of Sta. 102, southeast of Deweyville. 

 Oreohelix haydeni hybrida (Hemph.) under same conditions as at 

 Sta. 102, specimens more or less angled, but not on the average so 

 much so as at Sta. 104, sculpture more pronounced than at Sta. 102 

 and less so than at Sta. 104. 



Sta. 104, gulch about two miles south of Sta. 103, east of Madsen. 

 Oreohelix haydeni hybrida (Hemph.) common under same conditions 

 as at Sta. 102, strongly angled to slightly keeled, spiral sculpture 



