390 PROCEEDINGS OF THE ACADEMY OF [June, 



SucciNEA AVARA Say. 

 Vallonia gracilicosta Reinh. 



" PERSPECTiVA Sterki. 



PuPiLLA BLANDi Morse (3). 



" HEBES (Anc.) (1). 



" SYNGENES (Pils.) (|). 



PUPOIDES MARGINATA (Say). 



" HORDACEA (Gabb). 



BiFIDARIA PROCERA CRISTATA (P. and V.). 

 " PELLUCIDA HORDEACELLA (Pils.). 



" ASHMUNi Sterki. (1). 



" PERVERSA Sterki. 



" PENTODON (Say). 



" TAPPANIANA (C. B. Ad.). 



" TUBA P. and F. 



Vertigo ovata (Say). 



MILIUM Gld. (1). 

 Lymn^a parva Lea. 



" BULIMOIDES COCKERELLI P. and F. 



Planorbis caribous Orb. 



" LIEBMANNI Dkr. 



" PARVUS Say. 



" ARizoNENsis Pils. and Ferr.^ 



Physa virgata Gld. 

 Amnicola sp. (two dead specimens). 

 Sph.erium triangulare (Say). 

 PisiDiUM COMPRESSUM Prime. 



Vertigo milium, Bif. tappaniana and Sphcerium triangulare (one 

 valve) were obtained in 1904, not in 1910. The latter is new to the 

 fauna of the United States, but having compared with the type 

 specimens, we are satisfied of its identity. 



Part of the specimens we refer to Lymncea parva agree with cotypes 

 of L. dalli; but we have been unable to make a satisfactory division 

 of the material. 



Columella edenlula (Drap.) in the Huachucas. — We may add 

 here a species accidentally omitted from the Huachuca list published 

 in part III, of this series (1910). It was found at Wickersham's, 

 Miller Peak. 



IV. The Santa Rita Mountains. 



This fine and well-wooded range forms the eastern boundary of 

 the Santa Cruz River Valley. We drove in from Siding No. 4 on the 

 Sonora Railroad, camping at Agua Caliente, a large tepid spring 

 flowing into an artificial pool at the mouth of the canyon of the 

 same name, the elevation about 3,800 feet. Several Sonorella 



* Planorbis arizonensis, new name for P. fHocinctna Pilsbry and Ferriss, Proc. 

 A. N. S. Phila., 1906, p. 16.5, not of Sandberger. 



