344 Bulletin American Museum of Natural History [Vol. LIIT 
Corbicula tanganikana Bourcutenat, 1885, ‘Notice Prodrom. Moll. Giraud 
Tanganika,’ p. 104; 1888, ‘Iconogr. Malacol. Tanganika,’ pp. 41 and 42, Pl. xvin, 
figs. 8-10. Emendation of tanganyicensis Crosse. 
Corbicula radiata ‘“Parreyss” E. A. Smirx, 1904, Proc. Malacol. Soc. London, 
V2, p- 108: 
2Corbicula radiata GERMAIN, 1915, Bull. Mus. Hist. Nat. Paris, p. 261; 1908, 
‘Rés. Scientif. Voy. Afrique Foa,’ p. 696. 
Lake Tanganyika: the original specimen on which Crosse’s tanganyicensis was 
based, was obtained by J. Thomson. Bourguignat records tangantkana from the 
beach of Kapampa, on the southwestern shore and Germain lists C. radiata (possibly 
tanganyicensis) as obtained by Foa at the southern end. 
As figured by Bourguignat, this form is almost or quite ribless and 
of a markedly triangular shape. Possibly this feature has been exaggerated 
by the draughtsman; if not, a quite distinct species is indicated. 
A specimen collected by Stappers in Tanganyika is provisionally 
referred to this species. It is illustrated in Fig. 74. The surface is smooth 
except for low, narrow, spaced concentric riblets on the anterior half, not 
extending upon the anterior-dorsal slope. The color is sepia, becoming 
cinnamon along the ventral border and beaks, yellow at both ends. 
Interior is slate-purple in the cavity, with pale cinnamon lower border 
and white teeth. The hinge-plate is wider than in typical Nilotic C. 
radiata. | 
Length, 11.0 mm.; height, 9.9 mm.; diameter, 7.2mm. 
This form differs from C’. radiata edward: by the more prominent 
beaks, more triangular shape and the wider hinge-plate. 
Other Species of Corbicula Recorded from the Belgian Congo 
Corbicula fluminalis (O. F. Miller) 
Tellina fluminalis O. F. Mtuurr, 1774, ‘Verm. Terr. Fluv. Hist.,’ II, p. 205 (type 
locality: Euphrates River). 
Cyrena (Corbicula) fluminalis O. F. Miller. E. v. Martens, 1871, Malakoz. 
Blatte:, XVIII pp. 61 and 66, PI. 1, figs. 12-14. ; 
Corbicula fluminalis O. F. Miller. Drsuayss, 1854, ‘Cat. Conchif. Brit. Mus.,’ 
II, p. 222. Jicxeri, 1874, Nova Acta Ac. Nat. Cur. Dresden, XX XVII, 1, p. 283, 
Pl. x1, figs. 4-9. Gerrmarn, 1911, ‘Doc. Scientif. Miss. Tilho,’ II, p. 216 (with full 
synonymy); 1922, ‘Moll. Terr. Fluv. de Syrie,’ IT, p. 92. 
Cyrena fuscata LAMARCK, 1818, ‘Hist. Nat. Anim. sans Vertébres,’ V, p. 562 
[552] (type locality: ‘‘fleuves de Chine et du Levant’’). 
Cyrena cor LAMARCK, 1818, op. cit., V, p. 562 [552] (type locality: not given). 
Cyrena orientalis Lamarck, 1818, op. cit., V, p. 562 [552] (type locality: “ex 
Oriente’’). 
Cyrena consobrina CAILLIAUD, 1827, ‘Voyage & Meroé,’ IV, p. 263; 1823, Atlas 
II, Pl. LXI, figs. 10 and 11 (type locality: cana’s of Lower Egypt). 
