50 THE NAUTILUS. 



strongly striate above, smoother and very glossy below, not malleated r 

 or with only slight traces of malleation. Color dark raw umber or 

 passing into dark olive, with a conspicuous dark chocolate band 

 above the periphery, bordered with ecru-olive. Sutural line citron- 

 yellow. First four whorls russet or sometimes salmon-buff. Colu- 

 mellar lip spreads and is adnate over the umbilicus. 



Alt. 24, diam. 32 mm. 



Alt. 21.5, diam. 28.3 mm. 



Santee, 18 miles from San Diego, California, collected by the late 

 Mr. C. W. Gripp. Figured cotypes and eight others are No, 

 105300 A. N. S. P. 



This very handsome snail is probably most nearly related to E. t. 

 binneyi Hemph. which was described from a single specimen. It is 

 known to me by one " dead " shell from Murphy's Canyon Mission 

 Valley, San Diego Co., identified by Mr. Hemphill and given me by 

 Doctor Fred Baker. E. t. binneyi is less globose than grrppi,. 

 lighter colored, with no band. 



NOTES ON SOME OREOHELICES FROM WYOMING. 



BY HENRY A. PILSBRY. 



The material giving occasion for these notes was collected by Mr- 

 Don W. Walker in the vicinity of Shell, Big Horn Co., in northern 

 Wyoming, for Mr. Junius Henderson, Curator of the University 

 Museum at Boulder, Colo. We are indebted to Mr. Henderson for 

 the opportunity of studying the shells, and for various notes bearing 

 upon them, in part quoted below. 



OREOHELIX YAVAPAI EXTREMITATIS Pilsbry & Ferriss. 



Shell Creek Canyon, 10 miles northeast of Shell, Wyo., with 0- 

 cooperi and 0. pygmtza, see below. Dry Gulch 2 miles east and 3 

 miles north of Shell, a dry place without timber, only a few bushes ^ 

 dead weathered shells, strongly keeled. White Creek Canyon, 8 

 miles east of Shell, in very damp pine forest, only dead shells found. 

 Trapper's Creek 7 miles east of Shell, about 4 miles south of White 

 Creek Canyon, dead shells only. 



This is a carinated form which differs from 0. hemphilli (Newc.), 

 by being less excavated above and below the peripheral keel, the 



