1890.] NATURAL SCIENCEH OF THILADELPHIA. 33 



"Vertigo binneyana, sp. nov. 



Last year, ]\Ir. W. G. Binney kindly pi-esented me with two exam- 

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

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

 to publish a description founded upon only these two specimens. 

 Lately among a number of small Pvpidce from different parts of 

 British America sent by INIr. Geo. W. Taylor of Ottawa, there were 

 a few examples of this same species from Winnipeg, Manitoba, dead 

 and weathered, but good enough to be identified. 



They are of the size and general appearance of V. calloaa, very 

 narrowly perforate, cylindrical oblong, light chestnut-colored ; whorls 

 5, moderately rounded, nearly smooth ; aperature relatively small, 

 peristome little expanded : outer wall with a well formed crest in- 

 terrupted by a rather long revolving groove ; corresponding to the 

 crest there is a callus of lighter color ; lamellfe 6 ; on the apertural 

 wall a small supra-apertural and a well developed apertural; collu- 

 mellar appearing rather massive ; at the base one, rather small but 

 well formed, appearing tooth-like ; palatals 2, long, especially the 

 inferior. L. 2-0 D. TO mill. 



Probabl}' there are other examjiles 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 in 

 my collection. 



"Vertigo oscariana, sp. nov. 



This is the most peculiar of our species. It is of the size of mili- 

 um but oblong with either end nearly equally pointed, the last whorl 

 being considerably narrowed and flattened towards the subtriangu- 

 lar, small aperture; shell thin, delicate, of pale horn color, as is the 

 palatal wall and margin ; the latter simple and straight, with a very 

 slight, thin callus inside ; lamellae 3, whitish, rather small : one aper- 

 tural, one columellar (longitudinal) and the inferior palatal ; some- 

 times there is also a very small superior palatal. Length 1*5, diam. 

 0-8 m. m. 



This remarkable Vertigo has been detected in Eastern Florida, 

 on the coast at Mosquito Is., etc., by Mr. Oscar B. Webster and his 

 father, Mr. Geo. W. AVebster, of Lake Helen, Florida. These gen- 

 tlemen took much pains to ascertain the range of distribution of this 

 form and some others, and it is consequently only just to name 

 the species in honor of Mr. Webster. The most striking char- 

 acter of it, besides the narrowed last whorl, is the thin and 



