436 HELTCID.E. 



denticles ; at the columella it rises against a distinct nmbilical per- 

 foration. Length two and one half, diameter one and a half milli- 

 metres. 



Near Lake Snperior, Fort Resolution, Great Slave Lake (Ken- 

 nicott). New England ? 



Pupa fallax. 



Fig. 123. 



Shell tuiTCted, dusky; whorls six, smooth, convex; suture distinct; aperture 

 sub-oval; lip widely reflected; umbilicus distinct. 



Ci/clostoina marf/hiata, Say, Journ. Ac.ul. Nat. Sc. ii. 172 (1821) ; Binney's cd. 22. 

 Bulimus man/iiiatiis, Pfeiffer, Malac. Elatt. ii. 04; Mon. llel. Viv. iv. 414. — \Y. G. 



BiNNEY, 'I'crr. Moll. iv. 136. 

 Bnlimus fallax, GouED, in Terr. Moll. ii. 28S, pi. .'52. 

 Pupa fallax, Say, Journ. Acad. Nat. Sc. v. 121 (182.5); Bixxey's cd. 28. — Gould, 



Inv. 192, fi},^ 123 (1841), cxcl. svn. plarida ; Bo.st, Journ. Nat. Hist. iv. S.'^T, pi. 16, 



fi-. 15 (1843). — De Kay, N. Y. Moll. 51, pi. 35, fi<,r. 331 (1843). — Pfeiffer, Mon. 



IIcl. Viv. ii. 309 ; iii. 533 ; in Chemnitz, ed. 2 (1844), 58, pi. 12, figs. 20, 21. 

 Pupa Parralnmi, Oruigny, Moll. Cuba, 181, pi. 12, figs. 9-11 (1853). 

 Pupa albilahiis, Adams, Vermont Moll. 158 (1842) ; Sillim. Journ. [1] xl. 271. 

 Papilla filtax, Morse, Am. Nat. i. 609, fig. 53 (1868). 

 Piihuliiia tnrrila, Mexice 1 Syn. IMcth. 40. 



Shell small, tnrretcd, regularly and not rapidly tapering to a 

 somewhat jiointed apex ; color dusky or light horn color ; whorls 

 six, shining, moderately convex, very slightly and finely 

 wrinkled ; suture well-impressed ; aperture less than one 

 third the length of the shell, rounded oval, somewhat 

 irregular ; the preceding whorl forms a nearly transverse 

 boundary above, and is usually enamelled ; the ])illar lip 

 is nearly straight, and turns abruptly at the front, so as 

 to form nearly a right angle ; front broadly curved ; outer 

 lip white, widely and equally reflected and thickened ; 

 umbilicus distinct. Length, one fifth of an inch ; breadth, 

 one fifteenth of an inch. 



I have seen but two or three specimens of this shell which have 

 been found in Massachusetts, one of which was sent me by Dr. L. 

 M. Yale, from Martha's Vineyard ; I have seen others from Rhode 

 Island. It is found abundantly from Nebraska to Texas, and from 

 New England to South Carolina ; also in several of the West India 

 Islands. 



