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



To the genus Leptoxis are to be referred the following species : — 



Paludina disshniUx, Say (Binney's ed. p, 48) ; DeKay, N. Y. Moll. ^6 

 (1843), and Potiez & Micuaud, Gal. des Moll. I have not con- 

 sidered it necessary to repeat Mr. Say's description, the species 

 being well known and universally acknowledged to be a Leptoxis. 

 Paludina c>-cn<itii., Say, is mentioned as a species of Leptoxis by Dr. Brot 

 in his admirable "Materiaux pour servir a I'etude de la famille des 

 Melaniens," p. 24. Mr. Say described no such species. Prof. Hal- 

 denian describes a Lepfuxis under this name in the Monograph re- 

 ferred to by Dr. Brot. See also Somatogyrus. 



Fig. 128. Paludina Ininttrosa, Anthony, /. c— Shell ovate, thick, bright 



green, imperforate ; spire rather obtusely elevated, 

 composed of about 5 — 6 convex whirls ; upper whirls 

 smooth, body whirl and preceding one strongly striate 

 and granulate or subgranulate ; sutures very distinct ; 

 aperture ovate, nearly one-half the length of the shell, 

 livid within. 



Length about half an inch. 

 Alabama. My cabinet. 

 A single specimen only is before me, but it is sufficiently distinct ; 

 its granulated surface and the broad shouldering of the whirls are 

 its chief characteristics ; compared with P. gpiiicula, Con., it is more 

 slender, darker in color, and its granulated surface is of itself a suffi- 

 cient distinction. (^Anthony.) 



Paludina hnmerosa, Anthony, Proc. Acad. Nat. Sc. Phila. 1860, 

 p. 71. 

 From an examination of Mr. Anthony's type I have no doubt of 

 this being a nodulous species of Leptoxis, on which the nodules are 

 slightly developed. Fig. 128 is drawn from it. 



To the genus Melania are to be referred — 



Paludina virginica, Sat, Nich. Enc. 3d ed. (1819). 



Paludina rudis, Ravenel (Cat. of Cabinet, p. 12, 1834). No description 

 was given by Dr. Ravenel, who informs me that he found the spe- 

 cies at Danville, on the Dan River, and subsequently sent some spe- 

 cimens to Mr. Lea, who described them as ]\fela>iia injlafa. 

 Paludina nitida, Ravenel (Cat. of Cabinet, p. 12, 1834). No description 

 was published. Dr. Ravenel informs me that on submitting speci- 

 mens to Mr. Lea he pronounced them an undescribed species of Me- 

 lanin. They were found in the Dan River, at Danville. 

 To the genus Bitbynia (q. v.) has been referred the following: — 



Paludina tentaculafa, Lin. 

 To the genus Litha-sia is to be referred — 



