392 Bulletin American Museum of Natural H istory [Vol. LIII 
Fig. 87. Parreysia leopoldvillensis (Putzeys). Young shell from Zambi, length, 
25 10, 
Parreysia bakeri (H. Adams) 
Plate XX XI, Figures 5 and 6 
Unio bakeri H. Apams, 1866, Proc. Zool. Soc. London, p. 376. E. A. Smrru, 
1888, op. cit., p. 56; 1892, Ann. Mag. Nat. Hist., (6) X, p. 126, Pl. x11, fig. 11. E. v. 
Martens, 1897, ‘Deutsch Ost Afr., IV, Beschalte Weichth.,’ p. 231, Pl. vii, fig. 6. 
J. THIELE, 1911, ‘Wiss. Ergebn. D. Z. Afr. Exp. (1907—08),’ ITI, p. 212. 
Parreysia bakeri H. Adams. Simpson, 1900, Proc. U. 8. Nat. Mus., XXII, p. 
846; 1914, ‘Descript. Cat. of Naiades,’ p. 1125. 
Lake Albert: originally described from that lake without more definite locality 
(S. Baker Coll.; Emin Pasha Coll.); Kassenje (Stuhlmann Coll.; Schubotz Coll.). 
The specimens figured are part of a lot from Lake Albert without 
more exact location. Asin P. acuminata, the sculpture is rather coarse. 
There is considerable variation in outline, as the figures show. The 
figured valves measure: 
Length, 36.0 mm.; height, 23.0 mm.; semi-diameter, 9.5 mm. 
BAO oh AO) 3 8.5 
Parreysia mweruensis (EK. A. Smith) 
Plate XX XI, Figures 8, 9, 10 
Unio mweruensis E. A. Smiru, 1908, Proc. Malacol. Soc. London, VIII, p. 13, 
figs. (on p. 14). 
Unio (?) mweruensis HE. A. Smith. Simpson, 1914, ‘Descript. Cat. of Naiades,’ 
p. 730. 
Pareyssia mweruensis i. A. Smith. Simpson, 1914, ‘Descript. Cat. of Naiades,’ 
p. 1142. 
Unio (Nodularia) luapulaensis Preston, 1913, Rev. Zool. Afric., III, 1, p. 60, Pl. 
Ty chiey Li 
Lake Moero: originally described from that lake without more definite locality 
R. L. Harger Coll.). | Confluence of the Luapula and Lukulu Rivers (type locality 
(of U. luapulaensis). 
Lake Moero at Lukonzolwa; Luapula River at Kachiobwe and at 
Kasenga; Elisabethville (all Stappers Coll.). 
