1916.] NATURAL SCIENCES OF PHILADELPHIA. 321 



especially the western spurs, which we did not visit, and which are 

 further from territory thus far explored. Tintic folio, U. S. Geol. 

 Surv., covers the Eureka district. 



Oreohelix oooperi (W. G. B.) 



Sta. 6, on north side of Godiva Mountain, in Eureka, Utah, on a 

 slope of Paleozoic limestone, under shrubs and other vegetation, a 

 few under angular blocks of limestone, no good rock slides exposed. 

 A small form of this species is abundant here. We at first thought 

 it might prove to be new, but it differs from typical cooperi of other 

 localities only in its size, and, in average examples, a more nearly 

 pure white ground color. The latter character, however, is quite 

 variable here, but the size is unusually uniform, averaging about 

 14.5 mm., and varying scarcely a millimeter therefrom, one way or 

 the other. 



Oreohelix hemphilli eurekensis new subspecies. PL XV, figs. 7, 8. 



Shell small, sublenticular; spire slightly elevated; whorls 4§ to 

 4|, strongly carinated at the periphery, the carina having a tendency 

 to disappear toward the aperture of adults; whorls rounded above, 

 sloping roundly in to the suture so as to form an excavated suture, 

 and on the other hand sloping flatly to the periphery; transverse 

 sculpture well marked, irregular; spiral sculpture consists, in the 

 type, of 6 minute, beaded lines below the periphery, with very indis- 

 tinct lines in the interspaces and in the edge of the umbilicus; similar 

 sculpture above, but not so well defined nor so plainly of two grades; 

 on the cotypes the lines are not so well defined and not so plainly 

 of two grades below; umbilicus wide, exhibiting all the volutions; 

 apical whorls brown, very dark brown in the type, changing to dirty 

 white on the last whorl; two very obscure dark spiral bands, one 

 above, the other barely below the periphery. Type, in Univ. of 

 Colo. Museum, greater diam. 9.7, lesser 8.8, alt. 5.5. Cotype, in 

 Acad. Nat. Sci. Phila., greater diam. 9.3, lesser 8.5, alt. 6.5. 



Type locality, Sta. 6, Eureka, Utah, 7 specimens, all dead shells, 

 associated with 0. cooperi. The type and cotype are adults, and 

 one specimen in L. E. Daniels' collection probably fully adult but 

 with the peristome partly broken away. These specimens were all 

 submitted to Dr. Pilsbry, who writes as follows: "I at first thought 

 your little species from Eureka was 0. carinifera, but on further study 

 I am wholly of the opinion that it is a small subspecies of 0. hemphilli. 

 It differs chiefly by its smaller size and fewer whorls, the sculpture, 

 color and degree of carination being practically identical. 0. hemp- 



