NO i-u, SY \OI\SIS OF THE XJfADESSIlirSOX. 719 



t UNIO OSCARI B. H. "Wright. 



*l~nio oscari B. H. WRIGHT, Naut., V, 1892, p. 124; IX, 1896, p. 122, pi. n, tigs. 1-3. 

 Florida. 



tUNIO HAZELHURSTIANUS Lea. 



'" Unio hazelhurstianvs LEA, Pr. Ac. N. Sci. Pbila., II, 1858, p. 166; * Ji. Ac. N. Sci. 

 Phila., IV, 1859, p. 211, pi. xxvi, fig. 92; * Obs., VII, 1859, p. 29, pi. xxvi, fig. 

 92.* SOWERBY, Conch. Icon., XVI, 1866, pi. xxxv, fig. 188. -* B. H.WRIGHT, 

 Check List, 1888. *P.tTEL, Conch, Sam., Ill, 1890, p. 154. 



* Margaron (Unio) liazelhurstianus LEA, Syn., 1870, p. 60. 



Southern Georgia. 



tUNIO BUXTONI B. H. Wright. 



*Unio buxtoni B. H. WRIGHT, Naut., XI, 1897, p. 55 * SIMPSON, Pr. Ac. N. Sci. 

 Phila., 1900, p. 80, pi. i, fig. 6. 



Marion County, Florida. 



tUNIO FERRISSII Marsh. 



* Unioferrissii MARSH, Naut., V, 1891, p. 30.'* SIMPSON, Pr. U. S. Nat. Mus., XV, 



1892, p. 423, pi. LXVI, figs. 1, 2. 



Small creek near Palatka, Florida. 



tUNIO DOREI B.H.Wright. 



* Unio dorei B. H. WRIGHT, 2 Pr. Ac. N. Sci. Phila., 1888, p. 115, pi. in, fig. 1. 



Lake Monroe, Florida. 



(Group of Unio striatulus.) 



Shell subsolid, rhomboid oval, with a well-developed post ridge 

 ending in a point below; beaks full, with numerous subparallel, 

 slightly corrugated, strong ridges; epidermis ray less or faintly rayed, 

 with a few wrinkles on the posterior slope; pseudocardinals stumpy ; 

 laterals straight. Animal unknown. 



t UNIO STRIATULUS Lea. 



*Unio striatulus LEA, Pr. Acad. N. Sci. Phila., I, 1857, p. 86; *J1. Acad. N. Sci. 

 Phila., V, 1862, p. 55, pi. n, fig. 202. ' Obs., VIII, 1862, p. 59, pi. n, fig. 202.- 

 * SOWERBY, Conch, Icon., XVI, 1868, pi. LXXII, fig. 367." B. H. WRIGHT, 

 Check List, 1888.* P^TEL, Couch. Sam., Ill, 1890, p. 168. 

 Margaron (Unio) atriatulus, LEA, Syn,, 1870, p. 37. 



Roauoke River; Welden and Salem, North Carolina. 



1 This was first published in the Joliet Weekly News, a newspaper, May 1, 1891. 

 It is a puzzling form, having something the shape of the variety orcutti of U. buck- 

 leyi, but has plications ou the posterior slope such as are found in the Crassidens 

 group. 



2 1 do not know where to place this form, of which I have only seen the type. 

 The figure is not very accurate, aud I formerly thought it a variety of U. buckleyi, 

 but on seeing the type I believe it is uot that. It seems to combine characters of the 

 Buckleyi and Crassiderw groups. 



