184 APPENDIX. 



Malzine, in Essai sur la Fauna Mai. de Belgique, 1869, gives the following as new species, which I con- 

 sider as doubtful : 



Unio Lambottei. 



" Ryekholtii. 

 " Robianoi. 



Gentiluomo, in Bull. Mala. Ital., Pisa, vol. i.: 

 Unio Laivleyianus. 



Morch, in Am. Jl. Conch., vol. v. p. 38, informs us that Unio Grcenlandicus, Sehrot., is the same as testu- 

 dinarius, Speng. (marginalis, Lam.) from Tranquebar. 



Villa. A letter of March 10, 1S70, from Sig. Villa, Milan, asks my decision on a Unio Danelli described 

 by him, from Melbourne, Australia, but I have not had the advantage of seeing the shell, nor of 

 receiving the description which he sent to me. 



Wiegmann. Mollusca. Arch, fur Nat., 1835, vol. i. p. 317. 



Troschel. Neue Siissw. Couch, aus dem Ganges. Arch, fiir Nat., 1837, vol. i. p. 166. 



Von Martens. Ueber Siidbrasilische Land- und Siissw. Moll., Mai. Bliitt., 1868, came too late to insert 

 the species in the Synonymy of the Synopsis. 



Ludwig. Unio Munzenbergensis. Palaeontologia, vol. viii. 



Sowerl.y, in Conch. Icon., pts. 278, 279, 280, 281: 



Hyria exasperata . . . . = corrugata, Lam. 



" latialata = " " 



" rugosissima . . . = " " 



" recta = subviridis, Klein. 



" alata = " " 



Castalia Schoinbcrgiana = Prisodon truncatus, Schum. 



" ovata = " " " 



" Hauleyana . . . = " " " 



" Carolinensis* . = " " " 



" quadrata . . . . = " " " 



" dollabella . . . = Duprei, Recluz. 

 Anodonta biangulata . . = angulata, Lea. 



* The habitat given is South Carolina. No species of this genus has been observed in North America 



