HELICIDJE. 



I then supposed had been imposed by Mr. Say. Not 

 having since been able to procure any information about 

 its origin, and finding it to be destitute of meaning, and 

 probably a corruption of the word intended to be used, 

 I have ventured to substitute for it the specific name of 

 exoleta. This word was undoubtedly suggested to the 

 person first proposing it by the idea that the shell was 

 the adult, or superannuated form of H. albolabris. 



18. HELIX DENTIFERA, BlNNEY. 

 PLATE XII. 



H. testa orbiculato-depressa, imperforata, luteo-cornea ; 

 spira subplanulata, subtus convexa ; anfractibus transverse 

 striatis, striis crebris, minutis ; peristomate albo, margine 

 late reflexo ; columella valde unidentata. 



SYNONYMS AND REFERENCES. 



Helix dentifera, BINNEY, Boston Journ. Nat. Hist. I. 494, pi. 21. 

 DE KAY, New York Report, 31. 

 ADAMS, Mollusca, &c., 9. 

 PFEIFFEE, Monog. Helic. Viv. I. 317. 



DESCRIPTION. 



ANIMAL grayish on the sides and posterior extremity, 

 brownish on the upper parts, darker on the head and neck, 

 foot long and narrow, superior tentacles long and slen- 

 der, eyes black. 



SHELL flattened-convex on the upper surface, convex 

 below; epidermis yellowish horn-color, immaculate; 



