1918.] NATURAL SCIENCES OF PHILADELPHIA. 303 



Vallonia perspectiva Sterki. 



Santa Catalina Mountains: jMarble Peak, in quartzite slide on 



south side, 8,000 ft., rare. Galiuro Mountains: Whitlock ranch on 



the northern slope. 



PUPILLID^. 



Pupoides marginata (Say). 



Southern foothills of Rincon Mountains near the cave, Shaw's 

 Ranch, Station 148 (1918). 



Pupilla hebes (Ancey). 



Santa Catalina Mountains: Mt. Lemon, at head of the aspen 

 gulch, and I mile below, on the new trail, 9,500 ft., and on the north 

 side, 9,000 ft. Among those from the last locality, Station 37, 6 out 

 of 128 were albinos. Station 22, ridge near Marshall Pass. It 

 occurred in some abundance in all the localities except Station 22. 



Pupilla hebes nefas Pils. & Ferr. 



Pupilla hebes form nefas P. &. F., Pro?. A. N. S. Phila., 1910, p. 135. 



Santa Catalina Mountains: Station 20, northeast side of Kel- 

 logg Peak, 8,500 ft., Station 27, Bear Wallow, 214 specimens. Sol- 

 dier Camp, 63 specimens. Station 21, Desert Laboratory Station, 

 8,500 ft., 84 specimens. Station 22, ridge near Marshall Pass, rare. 

 Station 29, Leaning Rock, south side Alt. Lemon, 9,500 ft., 15 speci- 

 mens. Station 25, ridge of Marble Peak towards Mt. Lemon, 8,500 

 ft., 57 specimens. Station 26, "quartzite" slide on Mt. Lemon, 

 8,000 ft., 2 specimens. Station 28, marshy spring near trail, Mt. 

 Lemon, 1 specimen. Rincon Mountains: Spud Rock; Catalina 

 Saddle. 



P. h. nefas almost always has a small parietal tooth, and is usually 

 a little longer than P. hebes, with between 6 and 7 whorls. It differs 

 from P. syngeyies by having no crest behind the lip, though there is 

 usually a shallow, wide depression there. 



In onty one of the numerous stations mentioned above were hebes 

 and nefas found together. That was Station 22, where verj' few 

 shells were taken. Lots from all of the other stations, frequently 

 copious, were either all hebes or all nefas. 



Elsewhere P. h. nefas has been found only in two places in the 

 Chiricahua Mountains, at elevations estimated from 7,500 to 8,000 

 ft. It was not associated there with dextral hebes, which was found 

 at another Chiricahua locality. We are now disposed to rank P. h. 

 nefas as a well-marked subspecies. 



Chaenaxis intuscostata (Clapp). 



Southern foothills of the Rincons, near the Tucson-Benson high- 

 way, near the cave, Shaw's ranch, at about 3,500 ft. 



