AMERICAN SPECIES OP VERTIGO. 89 



Lower palatal is longer and enters more deeply than the upper. 

 The basal is subcolumellar in position. The outer lip bends 

 inward only very slightly; the crest and the external im- 

 pression over the palatal plicae are but weakly developed. 

 Length 2.2, diam. 1.35 mm. ; length of aperture 0.85 mm. ; 

 4% whorls. 



California: Mariposa Co., type no. 11644 A. N. S. P.; 

 meadow near Wawona, Sequoia Park, in the same county, H. 

 N. Lowe, 1916. 



Easily recognized by the shape of the outer lip. So far as 

 known, typical V. ovata does not occur in California. 



Mr. Low^e's specimens are a trifle smaller, 2.1 mm. long, 

 and the color is very dark. 



5. VERTIGO BERRYI n. sp. PI. 6, figs. 10, 13. 



The shell is oblong-conic, auburn, glossy, slightly irre- 

 gularly striate. The spire tapers from the last whorl, the 

 lateral outlines being slightly convex; summit is very obtuse, 

 of a paler tint. The whorls are rather strongly convex; the 

 last having an inconspicuous narrow, low ridge close behind 

 the lip expansion, preceded by a broad and deep impression 

 over the palatal region, above which it remains strongly con- 

 vex. Except for its smaller size, the aperture is about as in 

 V. ovata. There is a small angular lamella near the large 

 parietal ; coluniellar lamella rather massive, ascending inward. 

 Palatal plicae subequal, rather long, the basal fold smaller; 

 suprapalatal quite small. The teeth and palatal callus are 

 much lighter than the lip. The peristorne is expanded ; outer 

 border is slightly curved in, but far less than in V. ovata. 



Length 2.5, diam. to lip edge 1.35 mm. ; length of aperture 

 0.9 mm. ; 5^/2 whorls. 



California : Mill Creek Canyon, at 4600 ft., in the San Bern- 

 ardino Mountains; collected by Dr. S. S. Berry, July, 1910. 

 Type 105166 A. N. S. P. Also Valle Trinidad, Lower Cali- 

 fornia, C. E. Orcutt, 1901 ; no. 308964 U. S. N. M. 



This species differs from V. ovata by the relatively narrow, 

 almost straightly tapering spire, the much weaker inbending 

 of the outer lip, the minute crest outside the peristome, and 



