180 HELICID^E. 



40. HELIX AURICULATA, SAY. 

 PLATE XL. 



H. testa depressa, subtus convexa, corneo-rufescente ; 

 anfractibus striatis, striis distinctis, crebris, elevatis ; aper- 

 tura auriculata, angustissima, contortuplicata, ringente, mar- 

 ginibus connexis ; columella plica reflexa, dentiformi, in 

 aperturam intrante ; labro supra eminente, subtus ad basim 

 appresso, interne bi-plicato ; umbilico aperto. 



SYNONYMS AND EEFEKENCES. 



Polijgyra auriculata, SAY, Nich. Encyc. IV. ; Journ. Acad. I. 277. 

 Helix auriculata, FEKUSSAC, Tab. Syst. 37 ; Hist. pi. 50, f. 3, 4. 



DESHAYES in Lamarck, VIII. 112. 



BINNEY, Boston Journ. Nat. Hist. III. 384, pi. 19, f. 1, 2. 



CHEMNITZ, 2ed. tub. 65, f. 3, 4. 



PFEIFFER, Monog. Helic. Viv. I. 417. 

 Polygyra avara, SAY, Nich. Eucyc. IV. ; Journ. Acad. I. 277. 



FERUSSAC, Tab. Syst. 37; Hist. pi. 50, f. 2. 



Stenotrema avara, HAETMAN, Erd und Susswasser Gasterop. p. 84, tab. 22. 

 Helix Sayii, WOOD, loc. cit. Sup. pi. 7, f. 34. ? 



DESCRIPTION. 



ANIMAL longer than the breadth of the shell, acute 

 behind, above granulated and blackish, beneath and each 

 side "white ; upper tentacles long, slender, and tapering ; 

 lower ones short, and of nearly equal diameter.* 



SHELL depressed, very slightly convex above, below 

 convex ; epidermis brownish horn- color ; whorls more 

 than five, a little rounded, crossed by numerous distinct, 

 equidistant, oblique striae ; the upper part of the last 

 whorl, near the mouth, is suddenly reflected from the 



* Say, in Nicholson's Encyclopedia, American edition, Vol. IV. 



X 



