PLEUROCERA. 



81 



Fig. 152. 



before me from various habitats. It is allied to Melania (Trypanos- 

 toma) canaliculata, Say, but it may easily be distinguished from it by 

 the absence of a regular canal, and being a less pon- 

 derous shell. The color, too, is more of a yellow-green ; 

 usually there are three or four rather coarse striae about 

 the middle of the whorl, which form iri'egular canals. 

 The canal at the base is wide and much recurved. Seme 

 specimens are almost entirely smooth, and some are 1| 

 inches long. The aperture is about one-third the length 

 of the shell. I name this after Mr. J. G. Anthony, to 

 whom I am indebted for several fine specimens, and many 

 other species from Tennessee. — Lea. 



The first figure is from a Tennessee specimen, and is a 

 copy of that given by Mr. Lea. The shells quoted from " Fox 

 River, Indiana, J. Sampson," are more closely allied to Flor- 

 encense, and are probably identical with that species. 



This shell appears to be distinct from its congeners, but 

 approximates closely to Florencense on one side and Troostii 

 on the other side. It is a common species. 



25. P. prasinatum, Conrad. 



Melania prasinata, CoNRAD, Am. Jour. Sci., 1st ser., xxv, p. 342, 1. 1, f. U, Janu- 

 ary, 183-t. Jay, Cat., 4th edit., p. 274. Binney, Check List, No. 216. Brot, 

 List, p. 33. Catlow, Conch. Nomenc, p. 18S. DeKay, Moll. N. Y., p. 98. 

 Reeve, Monog. Melania, sp. 403. 



Fig. 153. 



Fig. 151. 



Description, — Shell subulate, slightly tur- 

 retcd, whoi'ls seven or eight, flattened, aper- 

 ture elliptical, a little oblique ; about one-third 

 of the length of the shell; body-whorl sub-, 

 angulated at base ; epidermis green-olive. 



Var. A. With broad revolving costas, those 

 on the l)ody-whorl crenulatcd. Inhabits Ala- 

 bama River, adhering to limestone rocks. 

 Cabinet of the Academy of Natural Sciences 

 of Philadelphia.— C'onrat?. 



L. F. W. 8. IV. 6 



