1927] Pilsbry-Bequaert,. The Aquatic Mollusks of the Belgian Congo ‘319 
Limnotrochus cyclostoma Bourcuienat, 1885, ‘Notice Prodrom. Moll. Giraud 
Tanganika,’ p. 60; 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. X, figs. 11-13; 1890, 
Ann. Sc. Nat. Zool., (7) X, p. 188, Pl. x, figs. 11-13. 
Lake Tanganyika: originally described from that lake without more definite 
locality (J. Thomson Coll.); Mpala (Storms Coll.); Ndanvie on the northeastern 
shore (W. A. Cunnington Coll.); Pambete (also type locality of L. giraudi and L. 
cyclostoma); Ufipa (Lechaptois Coll.). 
Stappers obtained this species at a number of places: Moliro (at a depth of 20 
meters); bay of Kasakalawe; between Moliro and Vua; bay of Tembwe; Uvira; 
bay of Sumbu; Baraka; bay of the Luvu; off Toa; at the mouth of the Ruzizi; and 
between Mwerasi and Kapampa. We have also seen specimens from Tembwe 
(Hubert Coll.). 
Cuytra J. E. S. Place 
Chyitra J. E. 8. Moors, 1898, Quart. Jl. Mier. Sci., N.S., XLI, p. 307. Monotype: 
Inmnotrochus kirkii E. A. Smith. 
Kytra J. E.S. Moors, 1901, Proc. Zool. Soc. London, II, p. 461. Misspelling of 
Chytra. 
Chytra kirkii (E. A. Smith) 
Text Figure 65c-d 
Limnotrochus kirkii E. A. Smrru, 1880, Ann. Mag. Nat. Hist., (5) VI, p. 426; 
1881, Proc. Zool. Soc. London, p. 286, Pl. xxx1, figs. 18 and 18b. Crosse, 1881, 
Journ. de Conchyl., X XIX, p. 128. Bourauianat, 1888, ‘Iconogr. Malacol. Tan- 
ganika,’ Pl. x, figs. 1-3; 1890, Ann. Sc. Nat. Zool., (7) X, p. 135, Pl. x, figs. 1-3. 
G. B. Sowrrsy, 1894, ‘List of Shells of Lake Tanganyika,’ p. 1, Pl., fig. 4. HE. v. 
Marrens, 1897, ‘Deutsch Ost Afr., IV, Beschalte Weichth.,’ p. 209, Pl. v1, fig. 40. 
Chytra kirkii FE. A. Smith. J. E. 8. Moors, 1898, Quart. Jl. Micr. Sci., N.S., 
XLI, p. 307, Pl. xxi, fig. 6; 1903, ‘The Tanganyika Problem,’ pp. 228-234, figs. 
11, 12, and 14-16, and p. 350, figs. Diasy, 1902, Journ. Linn. Soc. London, Zool., 
XXVIII, p. 434 (anatomy), Pl. xxxvim, figs. 10-11; Pl. xxxrx, figs. 12-21; PI. 
XL, fig. 25. E. A. Smrrx, 1904, Proc. Malacol. Soc. London, VI, 2, p. 84; 1906, Proc. 
Zool. Soc. London, I, p. 181. Grrmarn, 1905, Bull. Mus. Hist. Nat. Paris, p. 260; 
1908, ‘Rés. Scientif. Voy. Afrique Foa,’ p. 672. Ancny, 1907, Bull. Scientif. France 
et Belgique, (5) LX, (1906), p. 250. 
Kytra kirki E. A. Smith. J. E. S. Moors, 1901, Proc. Zool. Soc. London, IT, 
p. 470, Pl. xxv1, fig. 2. 
Lake Tanganyika: originally described without more definite locality (Hore 
Coll.); Masswa, in 25 fathoms (J. E. 8. Moore Coll.); Tembwe, in 20 fathoms (W. 
A. Cunnington Coll.); Ujiji; Karema. 
Stappers obtained it off Uvira; near the mouth of the Ruzizi; near the mouth 
of the Sambala; and in the bay of Kilewa. 
Paramelania Group 
Elongate shells, with spiral sculpture and tuberculate, axial folds; the aperture 
oval; the peristome thickened outwardly or produced at the ends. Operculum concen- 
tric, with paucispiral center. Side teeth much lengthened. 
