1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



287 



Santa Catalinas above 7500 ft.: Mt. Lemon, Stations 5 and 6 

 (1911), 32 and 37 (1913), on the trail to Webber's and other places. 

 Soldier Camp, Bear Wallow, Head of Alder Canyon (type loc, No. 

 119,033). Kellogg Peak, southeastern side. 



Rincons at station 22, Spud Rock Ranger Station, and Station 

 20, on the north slope. 



It lives in deep humid forest in colonies, as our eastern helices do, 

 under logs and bark of quaking asp and Arizona fir, sometimes by 

 dozens. Only at Spud Rock it was found deep in rocks, also humid. 

 It is a timber snail of the Canadian zone forest. In general aspect 

 the shell reminds one of the Calif ornian helices. 



This is a common snail in the heavily wooded upper levels of the 

 Santa CataUnas, taken at many stations. When picked up it emits 

 a strong unpleasant odor recalling that of the goldenrod of Thunder- 

 head mountain in East Tennessee (probabl}^ Solidago odora). This 

 was first noticed at Kellogg Peak. When picked up the snail shot 

 out two or three drops of liquid six inches or more (evidently ex- 

 pelled from the lung as the foot is retracted). One often smelled 

 them before finding any. But three or four shells broken by mice 

 or squirrels were noticed in the course of collecting, and it may be 

 that the snail-eaters object to the smell. 



By the genitalia this species is related to S. clappi of the Santa 

 Rita range, and S. ferrissi of the Dragoons, though differing from 

 iDoth in several details. The shell is most like S. clappi. It differs 

 from other Santa Catalina species by the minute granulation of the 

 surface, which gives it a dull, silky luster. 



The color is rather variable. At Soldier Camp (Fig. 4), Canada 



2 Specimen not fully mature. 



