INSTITUTE OF SCIENCE, PHILADELPHIA. . 335 



SO long been associated. For them there are aheady names enough and to 

 spare, and if Bulimus could be dropped altogether no great harm would result ; 

 but as a regularly proposed genus, with four or five species mentioned as ex- 

 amples, this cannot be done, unless we regard it as a synonym of Vivipara 

 (Geoffrey and) Martini. This, however, seems to be hardly warranted. Of 

 the three genera (as now understood) represented in Scopoli's list of exam- 

 ples, one, Liimicea, was separated from Bulimus (Bruguiere) by Lamarck in 

 1799. Succinea was proposed by Draparnaud, for Bnlimtts putris Scopoli, in 

 I So I. There remains only Bulimus tentaadata, for which Gray proposed the 

 genus Bithinia or By thinia in 182 1. I shall be glad of any suggestions as to 

 how we can avoid retaining Scopoli's name Bulimus for the species Helix ten- 

 taculata Linne. 



Vivipara georgiana Lea. 



Paludifia georgiana Lea, Trans. Am. Phil. Soc. v. p. 116, plate xix. fig. 85, 1S37. 

 Paludina Wareana Shuttleworth in Kuster, Conch. Cabinet, 21, pi. iv. figs. 10, 11 ; Reeve, 



Conch. Icon., sp. 23. 

 Vivipara georgtana Binney, L. and F. W. Sh. N. Am. iii. p. 27, figs. 49-51, 1S65. 



Caloosahatchie beds, abundant, especially in the upper layers ; widely dis- 

 tributed also in the Post-Pliocene of Florida, and living in the lakes and 

 swamps at the present day in Florida, Georgia, Mississippi and Alabama. 



The specimens in the Pliocene agree perfectly with the recent forms and 

 run through just about such a series of variations. I have not seen any Plio- 

 cene specimens which retain the color-bands or traces of them. . Mr. Pilsbry 

 has described some remarkable malformations which are exhibited by speci- 

 mens of this species from a mound in the vicinity of Lake George, Florida, 

 under the name of variety altior. They are due without doubt to the direct 

 physiological action of some obnoxious substance, such as salt, sulphur, etc., 

 in the water in which they lived. 



Turbo glaber H .C. Lea, from the Miocene of Petersburg, Va., is a Vivip- 

 ara. The type-specimen, now in the National Museum, is in poor condition, 

 but there can be no doubt as to the genus of the shell. Perhaps further ex- 

 ploration will reveal specimens in better condition which may be compared 

 with other known species. 



Family AMPULLARIID^. 



Genus AMPULLARIA Lamarck. 



Subgenus Pomus (Humphrey). 



AmpuUaria (Pomus) hopetonensis Lea. 



A. hopetonensis Lea, Trans. Am. Phil. Soc. v. p. 115, pi. xix. fig. 84, 1837. 



Pliocene of the Caloosahatchie beds, Willcox ; Post-Pliocene of Georgia, 

 Florida and Alabama ; living at Darien, Georgia, Lea. 



The specimens agree exactly with Lea's type of hopetonensis, which has 



