02 LAND AND FRESH- WATER SHELLS OF X. A. FART IIL 



Paludina aculeus, Kustek, Chemn. ed. ii, p. 73, pL xiii, f. 8-9, is there 



said to be Cim/ula aculeus. 

 Paludina sculurls, Jay, Cat. 3d ed. 112, pi. i, f. 8, 9 (1839) =Pliysa sra- 

 lans, q. v. (Land and Fresh-Water Shells, II.) The name is also 

 used in Zeit. fiir Mai. II, 164, 1845, oy Duxkek. 

 Paludina porcita, Say, is mentioned by name only in Meske's Syn. Meth. 

 p. 42 (1830) with P. katschkana, Pakk. and P. Jluminensis, Ziegler, 

 as its synonyms. 

 Paludina castnnea, Valenciexxes, Humboldt and Bonpland, Rec. d"Obs. 

 II, 256, is not specified as American. The description was drawn 

 from a specimen in the Paris Museum, locality unknown. 

 Paludina viridis of Virginia is quoted without description by Sowerby 

 (Tank. Coll. p. 43), Helix viridata, Budgix MS. being given as a 

 synonym. 

 Paludina maxima, Ravenel, Cat. 12 (1834), is unknown to me. Ko de- 

 scription was ever published. 

 Paludina decipiens is mentioned by name only among the American spe- 

 cies added to those cited in Lamark's Animaux sans Vertebres, by 

 Gould's translation (p. 70, Genera of Shells). I have no informa- 

 tion concerning it. 

 Finding Plcurocera of Rafinesque quoted in the synonymy of Vivipara 

 by Adams, Gen. Rec. Moll., 1 was inclined to place the following species 

 in Vivipara, but now omit them. See Rafinesque's Complete Writings, 

 1864, pp. 65 and 67. 



Pleurocera acuta, Enum. and Ace, p. 3. 

 Pleurocera rugosa, " " " p. 3. • 

 Pleurocera gonula, " " " p. 2. 

 Pleurocera verrucosa, Ann. of Nat., No. I, p. 11 (1820). 

 The genus Pleurocera is considered by Haldeman (Mon. of Lepfoxis and 

 Encycl. Icon., Baird's ed.) to be the same as lo. Lea, which last name not 

 having priority of publication would be considered a synonym of Pleuro- 

 cera. The following description of Rafinesque is translated from the Journal 

 de Physique, &c. of Brussels, LXXXVIII, p. 423. The fac-simile Fig. 126 is 

 from a MS. work of the same author, " Conchologia Ohioensis," presented 

 by Prof. Haldeman to the Smithsonian Institution. 



Pleurocera, I. c. — Shell spiral, oval or pyramidal, numerous rounded 

 whirls ; aperture oblong, oblique, base prolonged, twist- 

 Fig. 126. ^"^i narrowed above ; outer lip thin, interior lipappvessed 

 to the columella, which is smooth and twisted, without 

 umbilicus. Animal with a membranaceous operculum, 

 proboscis-like head, inserted on the back ; tentacles two, 

 lateral, subulate, sharp, eyes at their exterior base. 

 Family of Turhinacea. Species numerous, of which I 

 have already twelve, all fluviatile, from rivers and 

 Pleurocera. creeks. {Rafinesque.) 



