202 HELICID^. 



Remarks. Tliis rare species has hitherto been ad- 

 mitted with hesitation. In the Monogi-aph in the Bos- 

 ton Journal, III. 390, it was noticed xmder H. fatigiata, 

 ■without venturing to decide on its claims to a specific 

 place. No doubt, however, can remain, after an examin- 

 ation of numerous specimens, the distinctive characters 

 being found constant. It is smaller than H. fatigiata, 

 its umbilical perforation is far broader than in any other 

 of the polygyral group, and the sharp projecting inner 

 edge of the hp is bisected by a fissure as in H. hirsuta. 

 The columellar callus is much as in ff. fatigiata. 



47. HELIX LABYRINTHICA. 



PL.1TE XVII. FlGUKE 3. 



H. testa minutissima, sub-conica, apice obtuse, cornep- 

 rufescente ; anfractibus striatis, striis eminentibus, obliquis ; 

 labro incrassato, sub-refle.\o ; umbilico minimo, impresso ; 

 columella dente laminato in aperturam intrante. 



SYNONYMS AND KEFEEENCES. 



Eelix lahyrvnthica^ Say, Journ. Aci^d. I. 124; Nich. Encyc. IV. 

 KiKTLAND, Ohio Report, 173. 



BiNNEY, Boston Journ. Nat. Hist. III. 3D3, pi. 26, f. 1. 

 Gould, Invertebrala, 184, f. 106. 

 Adams, Vermont Mullnsca, 10. 

 Feeussac, Tab. Syst. 38; Hist. pi. 51, B. f. 1. 

 Pfeiffee, Symbol*, II. 31 ; Monog. Helic. Viv. I. 416. 

 Chemnitz, 2d ed. t. 06, f. 17 - 20. 



DESCRIPTION. 



Animal bluish black on the head, neck, and tentacles ; 

 other parts lighter, base of foot whitish. 



