50 



OBSERVATIONS. 



A large and beautiful species, common in the Ten- 

 nessee river at Florence. It is perhaps most nearly 

 allied to M. Sayi, (M. canalicuJata, Say,) but the 

 elevated line and form of the tubercles will distin- 

 guish it from that species. The epidermis is reddish 

 brown or black. 



MELANIA HYDEII. 

 Plate WW— Fig. 1, 



DESCRIPTION. 



Shell conical, rather elevated; whorls flattened, 

 with spiral acute tuberculated lines, one or two only 

 on each whorl of the spire, and about four on the 

 body whorl, the inferior one plain; aperture elliptical, 



OBSERVATIONS. 



Inhabits rocks in the Black Warrior river, south 

 of Blount's Springs, Alabama, and is very abundant. 

 It is remarkable for its distant tuberculated lines. 

 Young specin ens are olive, with a purple band on 

 each whorl, and are without tubercles; the body 

 whorl is angulated, and carinated. 



It is named in honour of Mr. William Hyoe, an 

 industrious and excellent Concholosrist. 



