1910.] NATURAL SCIENCES OF PHILADELPHIA. 325 



Oreohelix strigosa depressa (Ckll.). 



Sta. 44, visited by Daniels only, Rock Canyon, due east of Provo, 

 in limestone slides bordered by oak brush. Many examples with 

 the color bands faint or wanting, a few strongly banded. Two 

 sinistral shells were found. Shows same anatomical peculiarity as 

 at Tooele. St a. 7. 



Sta. 45, visited by Daniels only, Slate Canyon, first one south of 

 Sta. 44, limestone slides bordered by scrub oak brush. Banding 

 even less prominent than at Sta. 44. 



The Salt Lake City District. 



Oreohelix strigosa depressa (Ckll.). 



Sta. 46, about a mile up Emigration Canyon, southeast of Salt 

 Lake City, south side of canyon, under mountain maples and other 

 vegetation in fine limestone slide rock. This is a strongly banded 

 form whose anatomy, according to Dr. Pilsbry, agrees with that of 

 depressa from Colorado Springs and other localities, as well as from 

 our stations 2 (near McCammon, Idaho) and 28 (near Brigham, 

 Utah). The shells, however, of this lot and those from Sta. 2 differ 

 markedly from those of typical depressa from Durango, Morrison, 

 Steamboat Springs and other Colorado localities. Their relative 

 altitude and the altitude of their whorls in proportion to the trans- 

 verse diameter are much greater, and they scarcely show any of the 

 peripheral subcarination in front of the aperture so common, indeed 

 almost universal, in Colorado shells of this subspecies. On the 

 other hand, however, other lots from elsewhere in Utah, notably 

 near Ogden, appear to grade this lot quite well into typical depressa, 

 so that, from any information we now have, we do not dare to make 

 any separation. Oreohelices usually differ in relative altitude within 

 any given species or subspecies, and only the uniformity of the 

 increased altitude in this colony makes us hesitate. 



Oreohelix strigosa depressa (Ckli.). "var. carnea" (Hemph.). 



Patiiln, strigosa var. carnea Hemphill, Nautilus, IV, 15, 1890. Binney, 

 4th Suppl. to 5th Vol. Terr. Moll. U. S., p. 174, 1892. 



Sta. 43, Dry Canyon, about a mile from the University of Utah, 

 near Salt Lake City, in scrub oak and mountain maple thickets on 

 limestone, visited by Henderson in company with William McArthur. 

 This form was found abundantly here, the color bands faint or 

 wanting on most examples, but quite strong on a few. On an average 

 the specimens have a higher spire than typical depressa, but many 

 of them are well depressed. The description of depressa appeared 



