LYMN^A. MELANIA. 45 



with a moderately short acute spire ; greyish or 

 yellowish ; the lesser volutions not so abruptly 

 disproportionate to the body as the last. B. |. 

 T. 101. 



L. GLUTiNOSA. Semi- globular^ extremely 

 thin^ and inflated, amber-colour ; spire with three 

 scarcely produced volutions ; the larger one regu- 

 larly striate. B. 1. T.103. 



LES MELANIENS. 



MELANIA. FLUVIATILE. 



Turreted; aperture entire, ovate or oblong, effuse 



at the base ; columella smooth, and incurvated ; 



operculum horny. 



M. TRUNCATA. Turrctcd ; apex truncated, 

 solid, dark brownish, with small longitudinal ribs, 

 the upper ones more prominent ; numerous trans- 

 verse striae decussate the ribs ; whorls plano-con- 

 vex. If. E. 458. 3ab. 



M. AMARULA. Ovate-oblong, with the whorls 

 transversely keeled above, and the keel spinous ; 

 pale chestnut; seven whorls; somewhat ribbed. 

 \\. W. 35. 164. 



M. FASCIOLATA. Oblong - subulate, ventri- 

 cose at the base, thin, diaphanous, finely decus- 

 sated, greenish white, with brown longitudinal 



