394 Bulletin American Museum of Natural History [Vol. LIII 
Nodularia (Cxlatura) horei KE. A. Smith. Simpson, 1900, Proc. U.S. Nat. Mus., 
XXII, p. 823; 1914, ‘Descript. Cat. of Naiades,’ p. 1034. 
Nodularia horei B. A. Smith. Ancry, 1907, Bull. Scientif. France et Belgique, 
(5) IX, (1906), p. 255. 
Lake Tanganyika: originally described from that lake without more definite 
locality (Thomson Coll.). 
Parreysia lourdeli (Bourguignat) 
Unio lourdeli BouRGUIGNAT, 1887, Ann. Soc. Malacol. France, IV, p. 271 (type 
locality: shores of Lake Victoria). E. A. Smrru, 1892, Ann. Mag. Nat. Hist., (6) X, 
p. 128, Pl. x11, figs. 18-15. J. Turis, 1911, ‘Wiss. Ergebn. D. Z. Afr. Exp. (1907—08),’ 
IS p22. 
Nodularia lourdelli Bourguignat. Simpson, 1900, Proc. U. 8. Nat. Mus., XXIT, 
p. 826. 
Unio (Cafferia) lourdeli Bourguignat. Simpson, 1914, ‘ Descript. Cat. of Naiades,’ 
p. 581. 
Unio lourdeli var. smithi GmRMAIN, 1906, Bull. Mus. Hist. Nat. Paris, p. 306 
(based upon PI. xn, figs. 15 of E. A. Smith, 1892). Stmpson, 1914, ‘Descript. Cat. of 
Naiades,’ p. 581. 
Thiele refers to this species weathered valves from the Mkunga River near 
Ruasa, in Ruanda (Schubotz Coll.). 
Parreysia ujgijiensis (Crosse) 
Unio nyassaensis var. tanganyicensis E. A. SMITH, 1881, Proc. Zool. Soc. London, 
p. 298, Pl. xxxiv, fig. 34a (not Unio tanganyicensis E. A. Smith, 1880). 
Unio nyassaensis var. ujujiensis CrossE, 1881, Journ. de Conchyl., X XIX, p. 294. 
Grandidieria ujijiensis Crosse. Bourcauianat, 1885, Bull. Soc. Malacol. France, 
Lf, Pp. % 
Parreysia ujijiensis Crosse. Simpson, 1900, Proc. U. S. Nat. Mus., XXII, p. 
848; 1914, ‘Descript. Cat. of Naiades,’ p. 1138. 
Parreyssia ujiiensis Bourguignat. ANcry, 1907, Bull. Scientif. France et 
Belgique, (5) TX, (1906), p. 256. 
Lake Tanganyika: Ujiji (type locality; E. C. Hore Coll.). 
GRANDIDIERIA Bourguignat 
Grandidieria Bourcuianat, 1885, Bull. Soc. Malacol. France, II, p.4. Type 
by designation of Simpson (1900, Proc. U.S. Nat. Mus., XXII, p. 827): Unio burtoni 
Woodward. 
fuellama Boureuienat, 1885, ‘Notice Prodrom. Moll. Giraud Tanganika,’ p. 
92, footnote. Substitute for Grandidieria. Type by present designation: Unio 
burtont Woodward. 
“Shell small, oval, rounded or rhomboid, solid, much inflated, generally narrowly 
biangulate behind, often apparently of two forms, one more inflated in the basal 
and post-basal parts than the other; beaks high, curved forward and inward and 
pointed, very delicately and beautifully sculptured with zigzag lire, which become 
finely nodulous and sulcate on the disk, especially in front and behind; posterior 
