PLATE CLXVIII. 



FIG. I. 

 HELIX PUTRIS. 



MUD SN4IL, 

 GENERIC CHARACTER. 



Aperture of the mouth contracted and lunulated, 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell imperforate, obtuse, ovate, yellow: aperture ovate. 



Helix Putris : testa imperforata, ovata obtusa flava: apertura, 



ovata. Linn. Fn. Suec. 2189. 

 Gualt. t. 5. f. H. 

 Chem. Conch. 9. t. 135. f. 1248, 

 List. Conch, t. 123. /. 23 ? 



G 2 



