198 BULLETIN OF THE 



Vertigo Binneyana, Stekki. 



They are of the size and general appearance of V. callosa, very narrowly per- 

 forate, cylindrical oblong, liglit chestnut-colored; whorls 5, moderately rounded, 

 nearly smooth ; aperture relatively small, peristome little expanded ; outer wall 

 with a well formed crest interrupted by a rather long revolving groove ; 

 corresponding to the crest there is a callus of lighter color; lameilas 6; 

 on the apertural wall a small supra-apertural and a well developed 

 apertural ; columellar appearing rather massive ; at the base, one 

 rather small but well formed, appearing tooth-like ; palatals 2, long, 

 especially the inferior. Length '2 mm., diameter 1.0 mm. 



Last year, Mr. W. G. Binney kindly presented me with two exam- 

 V. Bimiey- ples of a Vertigo collected at Helena, Montana, by Mr. H. Hemphill, 

 whicli seemed to be of a new species ; but yet I did not like to publish 

 ~T" a description founded upon only these two specimens. Lately among' 



a number of small Pu/xV/te from different parts of British America sent by Mr. Geo. 

 W. Taylor of Ottawa, there were a few examples of this same species, from Win- 

 nipeg, Manitoba, dead and weathered, but good enough to be identified. 



Probably there are other examples of this species in collections, and more will 

 be found in the Northwest. It is named in honor of Mr. W. G. Binney, to whom I 

 owe the two beautiful specimens iu my collection. 



Vertigo Binneyana, Sterki, Proc. Ac. Nat. Sci. Pliila., 1890, p. 33. 



The above is Sterki's description. I am also indebted to him for the figure. 



Vertigo callosa, Sterki. 



There are in collections two different species under the name of V. Gouldii, Binn. 

 Their size and coloration is nearly the same, at least in most variations, as are also 

 the apertural lameUae as to number and position. Yet they are decidedly and con- 

 stantly distinct, especially by the formation of the outer wall at the aperture. 

 Judging from the descriptions and more especially from the figures, the true V. 

 Gouldii is the one characterized as follows: the last whorl is somewhat predomi- 

 nating, thus rendering the whole shell more ovate or conic ovate ; the palatal wall 

 near the aperture is decidedly flattened, or impressed, the impression comprising 

 also the crest and being especially well marked at the "auricle" (as I name the 

 more or less projecting part about the middle of the outer margin, to have a con- 

 cise expression), forming a roundish groove outside and a decidedly prejecting 

 angle inside, thus producing the " two curves meeting in the centre of the peri- 

 stome." A feature not striking, but only seen by careful examination, is the posi- 

 tion of the short tooth-like lamella at the base, somewhat nearer the margin than 

 the end of the columella, the base perceptibly widened at that place; the said 

 lamella is probably an equivalent of the inferior columellar lamella, which in most 

 Vertigos stands very low, in many exactly at the base. 



The other species, V. callosa, has the last whorl relatively less wide, so that the 

 whole shell is of a more oblong shape. In the palatal wall, only the part behind 



