Descriptions of New Fluviatile Shells. 



Length 0.70 inch (18 millim.). Diam. 0.38 inch (10 millim.). 

 Length of aperture 0.40 inch (10 millim.). 

 Breadth of do. 0.20 inch (5 millim.). 



Habitat. Alabama. 

 My cabinet. 



Obs. Allied to M. olivula Con. in general form, but seems to 

 differ by its body whorl, which is sub-angulated at its upper 

 part, near the top of the aperture, and slightly so at the mid- 

 dle ; the whorls of the spire have only one band, which is 

 above the middle ; lines of growth distinct, giving the upper 

 whorls a slightly varicose character. 



40. Melania fusco-cincta. 



Plate III. Fig. 20. 



T. ovata, glabra, subcrassa, stramineo-fusca ; spira brevi ; anfr. 4-5, 

 superioribus nigro-unifasciatis, ultimo magno, angulato, fasciis nigris latis 

 duabus una supra et altera subter angulum revolventibus; suturis valde 

 impressis ; apertura magna, late ovata, intus fasciata ; columella in- 

 curva, reflexa, foveata, sinura vix formante. 



Shell ovate, smooth, moderately thick ; spire very short, 

 consisting of 4-5 nearly flat whorls, with a broad, dark-brown 

 band revolving in the centre of each ; body whorl large, with 

 one band above the middle, and another at base, subangulated ; 

 sutures irregularly impressed, distinct ; columella well rounded, 

 indented and reflected at the middle so as partially to conceal 

 a small umbilical opening ; aperture large, broad-ovate, within 

 banded. 



Length 0.44 inch (11 millim.). Diam. 0.30 inch (7 millim.). 



Length of aperture 0.25 inch (6 millim.). 



Breadth of do. 0.17 inch (4 millim.). 



