328 PROCEEDINGS OF THE ACADEMY OF [May, 



that direction, while a few have a faint chestnut tinge suffusing the 

 whole shell, suggesting a tendency to approach the form castaneus. 

 Two reversed examples were found. 



The Brigham District. 



At Sta. 27, at a spring beside a poplar grove just outside the 

 mouth of the first canyon north of Brigham, Utah, in a thin film of 

 water flowing over small rocks, we found a small form of Physa, 

 which is tentatively identified as P. cooperi Tryon (?) by Mr. Bryant 

 Walker, who adds: "Though slightly larger, these agree very well 

 with some from California named by Hannibal." 



Oreohelix strigosa depressa (Ckll.). 



Sta. 28, up the steep canyon east of Sta. 27, in sandstone and 

 limestone slides at edge of small mountain maple and oak thickets 

 and other shrubbery. Conditions were not very favorable and 

 specimens were rather scarce and small, not running above 19 mm. 

 in diameter. 



The Cache Junction District. 



We include in this district the Wheelon, Clarkston and Newton 

 stations, as they are all within a few miles of Cache Junction, Utah, 

 and most of them produced some form of Oreohelix peripherica 

 (Ancey), which we wish to discuss somewhat fully. At the stations 

 south and west of the Junction we found the most interesting colonies 

 of Oreohelix we have ever visited. Hemphill collected the same 

 forms not very far from our stations, and recorded and distributed 

 them variously as from the "banks of Bear river, 'North of Brigham, " 

 or simply "Box Elder County, Utah." Our stations 29, 30, 31 and 

 32 are close to the Bear River, in Cache County, just east of the 

 Box Elder County line. Indeed, 29 may be really within Box 

 Elder County. Stations 33 and 34 are just west of the line in Box 

 Elder County, and likewise close to the river. 



Hemphill camped on the "banks of the Bear River," north of 

 Brigham, where the valley "was considerably broken by mountain 

 spurs, through one of which the river had cut its way, leaving high, 

 rocky cliffs on either side, with scattered clumps of bushes along 

 the river and on the edges of the bluffs." Wheelon is located just 

 where the river leaves the gorge, our Sta. 33 is not far below Wheelon, 

 34 within the gorge above Wheelon, 30, 31 and 32 just within the 

 upper part of the gorge, 29 on the bank of the river just above the 

 entrance to the gorge, while Cache Junction itself is in the valley 



