AMERICAN SPECIES OP VERTIGO. Ill 



and V. a. sanbernardinensis, it appears most closely related 

 to V. andrusiana. 



19a. Vertigo andrusiana sanbernardinensis n. subsp. PL 11, 

 figs. 6, 7, 8. 



The shell is shortly rimate, imperforate, oblong, tapering 

 very little upwards, terminating in a rounded, obtuse summit ; 

 cinnamon-brown, moderately glossy, weakly, irregularly stri- 

 ate. The whorls are rather convex, the last slightly flattened 

 over the lower palatal fold, a trifle swollen in front of the 

 flattening, but not crested, often having an impressed 

 line parallel to the suture over the upper palatal fold. 

 Teeth four to six: parietal lamella short, compressed, a 

 small, tubercular angular lamella, even with or in advance of 

 its outer end (sometimes wanting). Columellar lamella short 

 but rather massive. Lower palatal fold strong and rather 

 long, the upper palatal very much smaller and shorter. 

 (Basal fold small and tubercular, at the junction of basal and 

 columellar margins, and not present in the form selected as 

 typical). There is no noticeable callus between the palatal 

 folds. The outer lip expands very little; it is straightened 

 and slightly thickened internally above the middle. Colu- 

 mellar lip is narrowly reflected. 



Length 2.25, diam. 1.3 mm.; 5 whorls. 



Length 2.2, diam. 1.2 mm. 



Length 2.15, diam. 1.2 mm.; 5 whorls (type). 



Length 1.9, diam. 1.1 mm. ; 4% whorls. 



California: San Bernardino Mts., 7550 to 7750 ft., in the 

 cienaga below Bluff Lake (type loc.), that north of the lake, 

 and Bluff Lake meadow, everywhere associated with the local 

 races of V. modest a, all collected by S. S. Berry. 



This form stands close to V. andrusiana, but there is no crest 

 or contraction behind the lip, and no trace of a palatal callus. 

 It appears to represent one extreme of a series leading through 

 andrusiana to pygm&a. Whether the California form re- 

 quires subspecific separation from andrusiana is open to doubt, 

 but there is certainly some difference typically. It differs 

 from V. columbiana by the much darker color, by being less 



