PLATE LI. 



FIG. II. 

 HELIX AURICULARIA, 



EAR, Or WIDE MOUTH RIVER SNAIL. 

 GENERIC CHARACTER. 



Aperture of the mouth lunated, 

 **** Ovated, imperforated. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Without umbilicus : a narrow depression on the edge of the pillar 

 lip. Very ventricose, spire short and acute. Aperture very wide. 



Helix Auricularia : testa imperforate ovata obtusa, spira acuta 

 brevissima, apertura ampliata. Linn.*Syst. NaU 

 p. 1250. No. 708. 



Cochlea testa diaphana anfradtibus quatuor, mucrone acuto brevis-. 

 simo, apertura acutissima. Linn. F. Suec. I. 

 p. 376. No. 1315. II. No. 2192. 



Buccinum pellucidum subflavum, quatuor spirarum, mucrone acu- 

 tissimo, testae apertura omnium maxima. List, 

 H. An. Angl. p. 139. tit. 23. tab. 2. Jig. 23, 



