EASTERN PROVINCK NOivTIIERN RKGION SPECIES. l89 



Pupa decora, Gould. 

 Shell minute, cylindrical, rounded at apex, thin, shining, translucent, 

 of a "wine-yellow color, regularly striated by lines of growth ; ^i"- 1^^- 

 spire of 5 or 6 closely revolving, rounded whorls, deeply sep 

 arated at the sutures; aperture nearlj^ round or semioval, 

 obliquely limited by the penultimate whorl, armed with 4 

 slender denticles, the largest of them on the parietal wall, 1 

 on the columellar portion of the peristome, and 2 on the 

 outer portion, all disposed so as to form the arms of a cross; 

 the peristome is slightly reflexed and indented opposite the base of 

 the two labial denticles; at the columella it rises against a distinct um- 

 bilical perforation. Length, 2^"""; diameter, 1^""". 



Pui)a decora, Gould, Proc. Bost. Soc. Nat. Hist., ii, 263 (Dec, 1847), with a wood- 

 cut; in Terr. Moll., ii, .327, pi. Ixxi, tig-. 3. — Pfeiffer, Moii. Hel. Viv., iii, 

 555.— W. G. BiNNEY, Terr. Moll., iv, 143; v, 201, L. & Fr.-W. Sh., i, 238 

 (1868.)— Gould and Bixney, Inv. of Mass., ed 2, 435 (1870). 



Pupilla decora, Tryon, Am. Jonru. Conch., iii, 304 (1868). 



Near Lake Superior; Fort Eesolutiou, Great Slave Lake. It thus 

 appears to be a species of the Northern Eegion. 

 Animal unobserved. 



Pupa Hoppii, Moller. 

 Shell subperforate, cyliudrically ovate, thin, very delicately striated, 

 horn-colored, shining, pellucid ; spire terminating in an ob- rio^igo. 

 tuse cone; whorls 5, rather convex, the last scarcely equaling 

 two-fifths the shell's length, ascending above, somew4iat nar- 

 rowed towards the base ; columella deeply subplicate, pari- 

 etal wall of the aperture furnished with one tooth-like callus ; 

 aperture vertical, subsemicircular ; peristome thin, scarcely 

 expanded, its right termination quite arched. Length, 2f'"'"; '^eai'a^gfd."' 

 diameter, 1"™. 



PupaHoppii, Moller, lud. Moll. Gr., 4 (1842).— Troschel, Arch. f. Nat., 1843, ii, 126.— 

 CHEMNrrz, ed. 2, 163, pi. xix, figs. 29, 30. — Pfeiffer, Mod. Hel. Viv., ii, 

 328; iii, 536; iv, 666.— W. G. Bixney, Terr. Moll., iv, 147 ; L. & Fr.-W. Sh., 

 i, 235(1869); Terr. Moll., v, 198.— Morch, Auier. Jonrn. Couch., iv,30, pi. iii, 

 figs. 6-9 (1868), 



Pupa Steenbiichii, Beck, teste Morch, Nat. Bidrag af Gr.,75. 



Pupilla HopjAi, Tryon, Amer. Jonru. Conch., iii, pi. 4, p. 303. 



Inhabits Greenland, and has also been found at Anticosti Island. It 

 is therefore a species of the Northern Region. 



The description given above is translated from Pfeiffer. The speci- 

 men figured, which I refer to this species, has another denticle on the 

 columella and a lamina-like process within the aperture at the base of 

 the last whorl. 



