202 HELICID.E. 



REMARKS. This rare species has hitherto been ad- 

 mitted with hesitation. In the Monograph in the Bos- 

 ton Journal, III. 390, it was noticed under H. fatiyiata, 

 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. fatiyiata, 

 its umbilical perforation is far broader than in any other 

 of the polygyral group, and the sharp projecting inner 

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

 The columellar callus is much as in H. fatigiata. 



47. HELIX L.ABYRINTHICA. 



PLATE XVII. FIGURE 3. 



H. testa minutissima, sub-conica, apice obtuso, corneo- 

 rufescente ; anfractibus striatis, striis eminentibus, obliquis ; 

 labro incrassato, sub-reflexo ; umbilico minimo, impresso ; 

 columella dente laminate in aperturam intrante. 



SYNONYMS AND REFERENCES. 



Helix labyrinthica, SAY, Journ. Acad. I. 124; Nich. Encyc. IV. 

 KIRTLAND, Ohio Report, 173. 



BINNEY, Boston Journ. Nat. Hist. III. 393, pi. 26, f. 1. 

 GOULD, Invertebrata, 184, f. 106. 

 ADAMS, Vermont Mollusca, 10. 

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

 PFEIFFER, Symbolse, II. 31 ; Monog. Helic. Viv. I. 416. 

 CHEMNITZ, 2d ed. t. 66, f. 17 - 20. 



DESCRIPTION. 



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

 other parts lighter, base of foot whitish. 



