NEW FRESH WATER AND LAND SHELLS. 167 



RemarTcs. — A very dark-coloured and rather robust species. It resembles 

 M. tenebrosa herein described, but dijSers in having the whorls rather more 

 convex, and in the outer lip being more curved. All the specimens received 

 had the apex eroded. The number of whorls is therefore not ascertained. The 

 aperture is more than one-third the length of the shell. It is usually purplish 

 on the whole of the inside of the aperture. Some specimens are, however, 

 bluish. 



Melania rufa. Plate 5., Fig. 8. 



Testa IcBvi, turrita, subtenui, nitidd, tenebroso-rufd; spird elevatd; suturis impressis; anfractibus con- 

 vexis, superioribus carinatis; aperturd parvd, ellipticd, inferne subangulatd, intus purpuratd. 



Shell smooth, turreted, rather thin, shining, dark-red; spire elevated; sutures impressed; whorls convex, 

 towards the apex carinate; aperture small, elliptical, subangular below, within purplish. 



Hab. Mamma's Creek, Tenn. S. M. Edgar. 



My Cabinet, and Cabinet of Mr. Edgar. 

 Diam. .30, Length .85 of an inch. 



Remarks. — In form this species resembles M. teres herein described. It dif- 

 fers in the colour being red, and in being carinate on the superior whorls. 

 The most perfect specimen in my possession has the few first whorls broken. 

 I should suppose a perfect one would have eight whorls, and the aperture be 

 one-fourth the length of the shell. 



- Melania fusiformis. Plate 5., Fig. 9. 



Testa ItBvi, fusiformi, subtenui, luted, mucronatd; spird brevi; suturis linearibus; anfractibus senis, 

 ultimo magna et injlato; aperturd ovato-productd, albidd. 



Shell smooth, fusiform, rather thin, yellow, pointed at the apex; spire short; sutures linear; whorls six, .the 

 last being large and inflated ; aperture ovately elongated, whitish. 



Hab. Tennesee. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .27, Length .50 of an inch. 



Remarks. — This is a very remarkable species in regard to its form, resembling 

 as it does the young of some species of Columhella. The aperture is about 

 VIII. — 2 s 



