Catalogue: Re;ce;nti.y Described MoIvLusca 187 



Genus incertcc sedis. 



COKERIA Marshall, 191 6. 



Cok'cria Marshall, Naut, XXIX, 19 16, p. 133. 

 Type: Cokeria sotithaUi Marshall. 



CoKKRiA souTHALivi Marshall. 



Cokeria soitthalH Marshall, Naut, XXIX, 1916, p. 133, pi. IV, 



Type locality: James River, Huron, S. D. 



This genus and species are founded on an unique specimen collected by 

 the U. S. Bureau of Fisheries. It seems to combine the characters of both 

 Quadrula and Lnmpsilis, although the preponderance of the characters ap- 

 pear to be Quadruline. Indeed, but for the hinge teeth, which are quite like 

 those of Lampsilis, it would be considered a Quadrula. It is quite possibly 

 an abnormality of Quadrula undidata (Bar.). Unfortunately nothing is 

 known of the soft parts. Additional material is greatly to be desired. 



Family CYRENID^. 

 Genus CYRENA Lamarck, 1818. 



sSection POLYMESODA Rafinesque, 1820. 



Cyrena alabamEnsis Clessin. 



Cyrena alabamensis Clessin, Con. Cab., Cycladeen, 1869, p. 114, pi. XVIII, 



figs. 3-4. 

 Type locality : Alabama. 



Cyrena donaciformis Sowerby. 



Cyrena donaciformis Sowerby, Con. Icon., Cyrena, 1878, p. 108, pi. XIX, fig. 



108. 

 Type locality : Florida. 



Is Horidana Con. according to von Martens (Zool, Rec, Moll., 1877, p. 

 81) and Dall (29, p. 1447). 



Cyrena protexta Conrad. 



Cyrena prote.xta Conrad, Am. J. of Con., V, 1869, p. 107, pi. XII, fig. 3. 



Type locality : Tampa Bay, Fla. 



Is Horidana Con. according to Tryon, (A. J. of C, V, 1870, p. 227) and 

 Dall (29, p. 1447). 



