52 PROCEEDINGS OF THE ACADEMY OF [Feb., 



time, in 1864, Lea^ described Physa nuttallii, from Lewis River, 

 Oregon, but did not figure it. If, as we suspect and as Dr. Pilsbry 

 (Mss.) concluded some years ago, these names are synonyms, 7iut- 

 tallii has priority. In that event, all our records of P. ampullacea 

 should be changed to nuttallii Lea. 



The Sphcerium from Idaho Falls and the McCammon stations are 

 doubtfully referred to S. aureum Prime by Sterki. The beaks of 

 the McCammon examples are less elevated than the beaks of the 

 Idaho Falls material. 



The tjTpe locality of Lymncea hinkleyi Baker is the North Fork 

 of Snake River, eastern Idaho, and therefore must be not far north 

 or northeast of Idaho Falls. The type locality of Lymncea jack- 

 sonensis Baker is Jackson Lake, Wyoming, which is drained bj' the 

 South Fork of Snake River, and the species is also recorded from 

 Snake River. Baker, in his monograph, records Lymncea apicina 

 solida Lea from Salmon River, Idaho. 



Dubois, Idaho. 



In August, 1915, Daniels collected the following species in Beaver 

 Creek, at Dubois: 



Pisidium compressum Prime. Lymncea proxima Lea. 



Pisidium sp. Physa sparsestriata Tryon? 



Lymncea humilis rusiica Lea. 



The McCammon, Idaho, District. 



We revisited stations 1, 1| and 2, of 1915, and also established 

 several other stations. 



Sta. 1, west side of Port Neuf River, about a mile north of McCam- 

 mon. Oreohelix cooperi (W. G. B.) is very abundant under wild 

 cherry, wild rose and various shrubs, among large blocks of lava at 

 the foot of a low bluff. Pyramidula cronkhitei anthonyi Pils., three 

 dead shells. On the banks of the near-by slough we found Lymncea 

 proxima Lea, Pisidium (Sterki says P. huachucanum Pils., compare 

 also P. ashmuni), and Physa ampidlacea Old. In 1915 at this place 

 Daniels found a few Succinea, doubtfully identified at the time by 

 Walker as S. oregonensis gahhi Tryon. Pilsbry says: ''It is not 

 gdbhi. Just what it is I do not know. Has the microscopic sculp- 

 ture of stretchiana, but seems too big and too long. With a good 

 series one might come to some conclusion." 



Sta. 62, Port Neuf River, east of Sta. 1. Sphcerium near aureum 



spRoc. Acad. Nat. Sci. Phila., XVI, p. 116, 1864. 



