Catalogue Recenti^y Described Moeeusca 129 



Campeeoma RUFUM GiBBUM (Currier). 



Melantho gibba Currier, Am. J. of Con., Ill, 1867, p. 112, pi. 6, fig. 3, 

 Type locality : Grattan, Mich. 



Campeeoma ruEum geniculiEormE Pilsbry. 



Campeloma rufum geniculiforme Pilsbry, Naut., XXX, 1916, p. 42. 

 Type locality : Dooley Co., Ga, 



Campeeoma ruEum meridionaeE Pilsbry. 



Campeloma rufum meridionale Pilsbry, Naut., XXX, 1916, p. 42. 

 Type locality: Crozier's Branch, Cabarrus Co., N. C. Also Ijttle Sugar 

 Creek, N. C. and Georgia. 



Campeeoma spieemanit (Lea). 



Paludina s.pillmanii Lea, Pr. A. N. S. P., 1867, p. 81 ; Jour. A. N. S. P., VI, 



1868, p. 343, pi. 44, fig. 29; Obs., XII, 1868, p. 103, pi. 44, fig. 29. 

 Lioplax spillmanii Tryon, Mon., 1870, p. 35, pi. 14, fig. 7; pi. 15, fig. 8. 

 Type locality: Jackson Co., Ala. 



Tryon (1. c.) gives the type locality as Jackson Co., Miss. Numerous 

 specimens from several streams near Mooresville, Limestone Co., Ala,, col- 

 lected by Rev. H. E. Wheeler agree with the descriptions and figures given 

 by Lea and Tryon and are Campelomce. The embryonic young are strongly 

 and acutely bicarinated, differing in this respect from all the other species 

 of the genus. The operculum is wholly concentric. These shells agree very 

 exactly with the cotypes of C. decampii W. G. Binn. in the DeCamp collec- 

 tion. If this identification and approximation are correct, spillmanii Lea 

 will follow decampii into the synonymy of C. liinum (Anth.). 



Campeloma subsolidum (Anthony). 



Is a valid species. Whether the Paludina exilis of Anthony is a sexual 

 form as believed by Lewis and others or an individual or local mutation 

 is unsettled. The fact that it has not been found in southwestern Michigan, 

 where the species is a common one would seem to cast a doubt on its being 

 a sexual variation. 



Genus LIOPLAX Troschel, 1856. 



Ltoplax elltottii (Lea). 

 • Is a valid species. 



Lioplax pilsbryi Walker. 



Lioplax pilsbryi Walker, Naut., XVIII, 1905, p. 133, pi. IX, figs. 1-3. 

 Type locality : Chipola River, Fla. Also Econfine River and Mud Creek, 

 Fla. 



