96 



LAND AND FRESH-WATER SHELLS OF N. A. [PART IV. 



Fig. 182. 



Melania clonfjata. — Shell elevated aud acutely turreted, dark Lorn- 

 color "witli purple bands ; apex acute ; wliorls about ten aud slightly 

 depressed ; base angulated, aperture bluish-white 

 and about one-fourth the length of the shell. 



Habitat. — AVest Tennessee ; John Lea. 



Diameter, -5; length, 1-5 inches. 



Observations. — This fine Melania seems most to 

 resemble the sitbiilaris (nobis). It differs from it in 

 being wider, in being darker colored and in having a 

 less number of whorls. The bands in some speci- 

 mens are scarcely visible. — Lea. 



Reeve figures a shell under the name of elo7i- 

 gata (Monog. sp. 305) •which certainly does Dot 

 represent this species — it may represent a very 

 fine specimen of T. annuh'fera, Conrad. 



The species varies very much in form, and a very long narrow 

 variety has been described as distinct by Mr. 

 Anthony, as follows : 



Melania tracta. — Shell ovately-lauceolate, gracile, 

 brownish-green, longitudinally varicosely-plicate and 

 encircled with elevated lines ; Avhorls 7, very convex ; 

 sutures profound; aperture contorted, narrowly oval 

 lip produced in front ; columella white, mouth livid. 



Long. IJ ; lat. i poll. 



Habitat.— Ohio. 



Observations. — General form like M. Virginica, but 

 with the whorls more rounded. The delicate raised lines which sur- 

 round it are among its more obvious characters. — Anthony. 



39. P. gradatum, Anthony. 



Melania gradata, Anthony, Ann. Lye, N. Y., vi, p. 112, t. 3, f. 12, March, 1S54. 



BiNNEY, Check List, No. 130. Brot, List, p. 30. Reeve, Monog. Melania, 



sp. 2G1. 

 Melania cximia, Anthony, Ann. Lye. N. Y.. vi, p. 107, t. 3, f. 7, Marcli, 1S54. 



BixNEY, Check List, No. 100. Brot, List, p. 58. Reeve, Monog. Melania, ep. 



408. 

 Trypanostoma curtatum, LEA. Proc. Acad. Nat. Sci., p. 155, May, 1863. 



Description.— Shell conical, smooth, snWd, greenish horn-color ; spire 



