TIVIPARA. 45 



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

 deman describes a Leploxis under this name in the Monograph re- 

 ferred to by Dr. Brot. 



Paludina humerosa Anthony, 1. c. — Shell ovate, thick, bright Fig. 78. 

 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. genicnla, Con., it is more 

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

 cient distinction. (Anthony.) 



Paludina humerosa, 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. 78 is drawn from it. 



To the genus Melania are to be referred — 



Paludina riidis, 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 Melania inflata. 



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- 

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



To the genus Bithynia (q. v.) have been referred the following : — 

 Paludina nucha, Lea, Tr. Am. Phil. Soc. VI, 91. 

 Paludina seminalis. Hinds, Voy. Sulphur. 

 Paludina tentaculata, Lin. 



