CALIFORNIA^ LAND SHELLS— BARTSCH. 



613 



mouth, altitude about 3,250 feet; 10 dead shells, A. G. Smith and S. S. Berry, Jan- 

 uary 7, 1914; three living specimens, A. G. Smith, May 12, 1914; one living specimen, 

 S. S. Berry, April 8, 1915. 



Remarks.— This fine helicoid, one of the largest of the southern fauna, is distin- 

 guished by the aforementioned characters from all others known to me. It perhaps 

 resembles a very large and extremely flattened form of E. traskii more than any of the 

 other Californian species, and I believe the two species to be rather nearly allied, 

 though the situations in which they are respectively to be found are very dissimilar. 

 E. petricola was first discovered while quarrying through a rocky slide iu the possible 

 hope of obtaining Micrarionta or Sonorclla, genera as yet unknown from the San Ber- 

 nardino Range. The species does not seem to be an abundant one, and several hours' 

 arduous labor in turning over large blocks of stone and clearing out the detritus, 

 repeated on several occasions, have yielded to date only a single adult living specimen, 

 all the remainder being immature or merely dead shells. While probably occurring 

 all through Mill Creek Canyon, and perhaps neighboring parts of the range in favorable 

 situations, only the one slide of the few so far examined has yielded specimens. A 

 find by Mr. Smith of several shells on or near the surface leads to the belief that the 

 species is not always, if ever, of strictly subterranean habit, at least not in the same 

 sense as SonoreUa. 



The two paratypes sent to us by Mr. Beny give the following 

 measurements : 



The following additional adult specimens have been examined. 

 No measurements were taken of pathologic and injured material; 

 hence, most of the specimens called ver7ia by Hemphill and all of his 

 saucius drop out. 



Measurements of Epiphragmophora traskii traskii. 



