288 HELICID^. 



Draparnaud, correspond with our shell. It is found 

 under stones and fragments of wood, and especially 

 among moss, in damp places. 



[This shell should be removed to another family, 

 under the name of CarycMum exiguum. Besides the 

 peculiar structure of the shell, and the form of its aper- 

 ture, the position of the eyes of the animal plainly remove 

 it from the true Melicidce, and associate it with the Auri- 

 culidce. Its habits, and the characters of the shell, also 

 indicate the same relation. Thus, the validity of the 

 genus Carycldum, instituted from the shell alone, and its 

 true position assigned to it by Gray, is fully sustained 

 by the character of the animal. — G.] 



10. BULIMUS FALL AX, Gould. 

 Plate LII. ^lat'EE 1. 



P. testa fusiformi, acuminata, corneo-rufescente ; anfract- 

 ibus sex, convexis ; apertura sub-rotundata, edentula ; labro 

 albo, late reflexo ; umbilico perforato. 



SYNOSYMS AND EEFEKENCES. 



Ctjdostoma marginata. Say, Journ. Acad. II. 172. 

 Pupafallax, Gould, Invertebrata, 192, f. 123. 



Bost. Journ. Nat. HiVl. IV. 357, pi. 16, f. 15. 



De Kay, New York Fauna, 51, pi. 35, p. 331. 



Pfeiffer, Monog. Helic. Viv. 11. 309. 

 Pupa albilabris, Adams, Vermont Mollusca, S; Sillim. Journ. XL. 271. 



DESCRIPTION. 



Animal. Head, neck, and tentacles black, posterior 



