168 DESCRIPTION OF 



two-thirds the length of the shell, and is somewhat angular at base, above it 

 turns inward. One of six individuals before me has two rather broad bands. 

 On the superior whorls may be observed an indistinct stria. 



Melania clav^formis. Plate 5., Fig. 10. 



Testa l<Bvi, clavaformi, subtenui, castaneo-fuscd, nitidd; spird acuta; suturis subimpressis ; anfracti- 

 bus octonis, convexis; aperturd productd, pallido-purpured. 



Shell smooth, club-shaped, rather thin, chestnut brown, shining; spire acute; sutures somewhat impressed; 

 whorls eight, convex; aperture elongated, light purple. 



Hab. Ocoee District, Tenn. Dr. Troost. 

 Clinch River, Tenn. Dr. Warder. 

 My Cabinet, and Cabinets of Dr. Troost, Dr. Warder, and P. H. Nicklin. 

 Diam. .27, Length .67 of an inch. 



RemarJis. — The aperture is about one-third the length of the shell. In 

 colour it differs from most species. 



Melania gracilis. Plate 5., Fig. 11. 



Testa IcBvijClavaformi, subtenui, corned; spird acuta; suturis impressis ; anfractibus octonis, convexis: 

 aperturd parvd, ovatd, albidd. 



Shell smooth, club-shaped, rather thin, horn-coloured; spire acute; sutures impressed; whorls eight, con- 

 vex; aperture small, ovate, whitish. 



Hab. Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .32, Length .75 of an inch. 



Re?narks. — This resembles the clavata in form, but is rather more robust. 

 It differs also in colour. The aperture is rather more than one-third the length 

 of the shell. 



Melania subsolida. Plate 5., Fig. 12. 



Testa Icevi, subfusiformi, subsolida, cornea; spird acuta; suturis impressis; anfractibus subconvexis ; 

 aperturd suhproductd, intus purpured. 



