1917.] NATURAL SCIENCES OF PHILADELPHIA. 77 



Lymncea iraskii Tryon. Physa sp. 



Planorbis parvus Say. • 



Call" records Paludestrina longinqua (Gld.) from Lake Point, 

 a short distance west of Garfield, and Pilsbry^* records Amnicola 

 {Cincinnatia) cincinnatiensis (Anth.) from the same place, as well 

 as from Salt Lake and the Sevier Lake Valley. 



Sta. 14, southeast of Black Rock, in a small ravine, above the 

 lowest prominent limestone ledge and below the second one. 



Sta. 119, down the slope from Sta. 14, below the lower ledge. 



Sta. 15, gulch southeast of the railroad flag station of Morris, 

 perhaps four or five miles south of Sta. 14. 



Sta. 123, south side of a ravine about half a mile north of Sta. 15. 



Sta. 122, next gulch north of Sta. 123. 



Sta. 121, west slope of mountain and next gulch north of Sta. 122, 

 almost connecting with Sta. 120. 



Sta. 120, gulch and divide north of Sta. 121. 



Oreohelix haydeni oquirrhensis (Hemph.). 



Patula strigosa var. oquirrhensis, Hemphill, Binnev's 2d Suppl. to 5th vol. 



of Terr. Moll. U. S., pp. 30, 3-i, PI. II, fig. 12. 

 Patula strigosa var. gabbiana Hemphill, Binney's 2d Suppl. to 5th vol. Terr. 



Moll., pp. 30, 34, PL II, fig. 9. 

 Patula strigosa var. utahensis Hemphill, Binney's 2d Suppl. to oth vol. of 



Terr. Moll. 



Further collections in the Oc^uirrh Mountains and a careful study 

 of the material obtained by us, as well as a study of Hemphill's 

 material, convinces us that the forms above mentioned cannot be 

 considered distinct subspecies, though the names maj^ be useful as 

 descriptive terms by which to designate the different phases. 

 Tj^ical oquirrhensis is a robust shell, with strong revolving ribs. 

 The form gabbiana is less robust, with less pronounced and sometimes 

 almost obsolete ribs. The form utahensis, as distributed by Hemphill, 

 is smoother than gabbiana, with a less pronounced keel. Though the 

 extremes are so very different, complete intergradation is found 

 within a short distance, and in each gulch there is a considerable 

 difference in shape, size and sculpture. In our former report we 

 referred a few shells obtained at Sta. 14 to gabbiana. We revisited 

 this station and Sta. 119, a few rods below 14, and found dead shells 

 rather common in small rock slides, but a thorough search of the 

 slides and the scant shrubbery brought to light no live examples. 

 This material seems referable to the form utahensis, of which these 



"U. S. Geol. Surv., Bull. 11, p. 20. 

 38 The Nautilus, XII, p. 122, 1889. 



