170 HELICID^. 



Vancouver, Oregon Territory, whence numerous speci- 

 mens were brought by Mr. Nuttall, and by the Explor- 

 ing Expedition. It was also brought by Mr. Hinds 

 from the region of Nootka Sound. 



Remarks. This species is remarkable for the pro- 

 minence and distinctness of the smaller whorls to the 

 very apes. They rise above each other with such a 

 regular diminution from the outer whorl to the point, 

 that the profile resembles a depressed cone.- It is of 

 very nearly the same size as M. clausa, Say, which it 

 resembles in general appearance ; but it has one more 

 whorl, is more flattened, has a more conical spire, and 

 less rounded whorls, and wants the rounded aperture. 

 The umbilicus is also more open than in that species. 

 The general shape is much less globular. It must also 

 be compared with the next species. 



33. HELIX LABIOSA, Gould. 



Plate. XIII. a. Figure 1. 



H. testa depresso-conica, subtus convexa, arete umbili- 

 cata, luteo-cornea, pilis sericeis quincuncialiter dispositis 

 undique villosa ; spira anfractibus sex convexis, uhimo 

 abnormaliter crescente, et pone labrum valde contracto ; 

 apertura angusta, lunata, labro albo, late rcvoluto ; fauce 

 livida. 



SYNONYMS AND EEFEEENCES. 



Helix labiosa, Gould, Proc. Bost. Soc. Nat. Hist. II. 1G5, Aug. 1846. 

 Expedition, Sliells, p. 16. 

 Pfeiffek, Monog. Helic. Viv. I. 343. 



