1899.] NATURAL SCIENCES OF PHILADELPHIA. 315 



V. ventricosa, to which this form Avas formerly referred by Mr. 

 Taylor, is a very much more ventricose, shorter species, with 

 shorter palatal folds. 



Pupa decora Gld. also occurs at Laggan, the specimens having 

 formerly been recorded thence as P. hoppii. It is evidently a 

 wide spread species in British America and Canada, as specimens in 

 the collection of the Academy from Labrador, Alberta and Alaska 

 attest. 



Among other interesting shells received from Mr. F. H. Andrus, 

 were examples of an apparently new Vertigo, a description of 

 Avhich follows: 



Vertigo andrusiana n. sp. Fig. 3. 



Shell cylindrical ovate, but slightly tapering above, obtuse; 

 glossy, of a dark chestnut color, becoming lighter and somewhat 

 gray on the upper Avhorls. WhorLs 5h, moderately convex, the 

 last with a moderate crest or ridge, and then a rather wide con- 

 striction behind the slightly expanded lip, a slight furrow crossing 

 the constriction and terminating in a slight entering angle on the 

 outer lip. Aperture rounded and truncate, obstructed by five 

 white teeth; the parietal rather high, short, the columeUar situated 

 rather high, a small denticle close to the base of the columella, and 

 two subequal palatal laminse (their positions indicated by slight 

 indentations outside), the lower one more deeply situated. Alt. 

 2.46, diam. of last whorl above aperture 1.33 mm. 



Douglas county, southwestern Oregon, collected by Mr. F. H. 

 Andrus. 



Compared with V. binneyana Sterki, this species differs in being 

 much larger, with the outer lip scarcely incurved to define an 

 upper arc of the peristome, and with the palatal folds subequal, 

 the lower one not conspicuously longer. It resembles Pupa decora 

 Gld. somewhat in size and color, but is readily separated by the 

 different dentition of the aperture and the transverse groove 

 behind the lip characteristic of Vertigo. 



For comparison I figure a specimen of V. binneyana (fig. 2) 

 from Winnipeg, Manitoba, No. 60,465, Coll. Acad. Nat. Sci. 

 Phila. Shells from Helena, Mont., and Seattle, Wash., are 

 perceptibly more cylindrical than that figured. 



