Noijus. SYNOPSIS OF THE NJfADES—SIAirSOX. 719 



t UNIO OSCARI B. H. Wright. 



* rnio osvari B. H. Wright, Naut., V, 1892, p. 124; IX, 1896, p. 122, pi. ii, figs. 1-3. 

 Florida. 



tUNIO HAZELHURSTIANUS Lea. 



'' Unio Jiazelhurstiamts Lea, Pr. Ac. N. Sci. Phila., 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.etel, 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. 



* Unio ferrissii Marsh, Naut., V, 1891, p. 30.' — * Simpson, Pr. U. S. Nat. Mas., XV, 



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



Small creek near Palatka, Florida. 



tUNIO DOREI B. H. Wright. 



* Unio dorei B. H. Wright,^ Pr. Ac. N. Sci. Phila., 1888, p. 115, pi. iii, 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 rayless 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. ii, fig. 202. — " Obs., VIII, 1862, p. 59, pi. ii, fig. 202 — 

 " SowERBY, Conch, Icon., XVI, 1868, pi. lxxii, fig. 367. — ' B. H. Wright, 

 Check List, 1888.—* P^tel, Conch. Sam., Ill, 1890, p. 168. 



" Margaron {Unio) striatulus, Lea, Syn., 1870, p. 37. 



Eoanoke Eiver; Welden and Salem, North Carolina. 



' 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. 



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

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

 but on seeing the type I believe it is not that. It seems to combine characters of the 

 Buckleyi and Crassidens groups. 



