6 



Limitaris has had rather a checkered history in the literature, as the 

 synonymy shows, but it is a characteristic Oreohelix, and its near connex- 

 ion with the widespread coopm'-series seems self-evident. Within this 

 series, the 0. c. apiarium, recently described (Berry 1919, p. 198) from the 

 Pacific side of the divide in Glacier National park, not many miles 

 south of the type locality of limitaris, is easily the nearest of the named 

 subspecies. The two are in fact very close, and it is entirely possible that 

 the investigation of material from a wider range of localities may show that 

 it is impracticable to draw any arbitary line between them. The lots so 

 far seen, however, are readily separable upon grounds already outlined in 

 a former publication. 1 



Oreohelix cooperi (W. G. Binney), vars. 

 Material Examined 



The three miscellaneous lots of Oreohelix here listed are all plainly 

 referable to the general cooperi concourse, but it is doubtful whether the 

 discovery of more complete material will show all to be referable to the 

 same subspecies. The three specimens from Wigwam river in particular 

 have an aspect all their own, but as only one of the three is a reasonably 

 fresh shell, it appears inadvisable further to encumber the literature in 

 their behalf. The Moyie shell is altogether different, resembling some of 

 the shells from the writer's Station V on the east side of the divide in Glacier 

 National park, Montana, more than it does any other race of cooperi of 

 which the writer is cognizant. 



Oreohelix strigosa canadica new subspecies 

 Plate I, figures 6-7 



Description. The shell is of moderate size, broadly conical, with an obtuse 

 apex. The surface is rather strongly satiny, but roughened by the irregular, 

 coarse, and very crowded lines of growth. Spiral sculpture is represented 

 by a few obscure and intermittent traces on the upper surface of the whorls, 

 becoming wholly obsolete below. The periphery is strongly subangular, 

 quite acutely so up to the body whorl, but becoming more obtuse near the 

 aperture. The umbilicus is wide and well-like, contained about six times 

 in the diameter of the shell, its interior visible to the apex, and its circular 

 outline but little discommoded by the slight reflection of the inner lip. 

 The outer lip is thickened and bevelled a little, but not reflexed. 



Op. cit., p. 201. 



