70 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Sta. 114, south side of canyon, about a mile southeast of Morgan 

 depot, close to a big warm spring and picnic ground, where the broad 

 valley narrows into the canyon, east side of a limestone ledge at the 

 base of a red sandstone hill. Oreohelix strigosa depressa (Ckll.) 

 abundant beneath Balsamorrhiza sagittata, sagebrush and other 

 herbs and shrubs overhanging the rocks, but equally abundant deep 

 in the red soil beneath such plants; an unusual habitat for this 

 subspecies. 



Sta. 115, west side of the same ledge, the same subspecies. Sta- 

 tions 114 and 115 constitute really a single colony, but we arbitrarily 

 separated it and gave different numbers to our material, because 

 many of the shells from one side of the ledge are more depressed than 

 those from the other side, though the ledge is narrow and the colony 

 actually extends across it. 



Sta. 113, a short distance up the canyon from Sta. 114, on same 

 side. Oreohelix strigosa depressa (Ckll.), dead shells very abundant 

 on a limestone slope where the scrub oak and mountain maple 

 thicket has recently been burned and all leaves and underbrush thus 

 destroyed. 



Sta. 112, big limestone slides not far above Sta. 113, on same side 

 of canyon, concealed from the road by tall shrubbery. Oreohelix 

 strigosa depressa (Ckll.), small (15 mm. to 18 mm. in diameter), 

 white, strongly banded. 



- Sta. Ill, next point of rocks, about 200 yards east of Sta. 112, 

 at foot of canyon wall, beneath limestone ledge, perhaps two miles 

 east of Morgan. Oreohelix peripherica (Ancey) common in leaves 

 beneath scrub oaks and mountain maples, showing complete inter- 

 gradation between Hemphill's binneyi and albofasciata forms, as at 

 several stations in the Cache Junction district, discussed in our 

 former report. This station is about 65 miles from Cache Junction 

 in an air line. 0. peripherica at all other stations where we have 

 found it lacks the albofasciata form, so it is interesting to find the 

 intergradation again at this most remote station for the species. 



Sta. 110, some distance above Sta. Ill, on same side of canyon, 

 below the railroad tunnel, nearly opposite Sta. 53. Oreohelix strigosa 

 depressa (Ckll.), dormant, deep in the rock slides and hard to find 

 during the hot, dry season when we were there. Generally this 

 subspecies has not been found by us very deep in the slides. 



Sta. 48, both sides of and above the "slide," south side of canyon. 

 Devil's Slide, Utah. Oreohelix haydeni hybrida (Hemph.) common 

 beneath the heavy, drooping radical leaves of Balsamorrhiza, on 



