1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo - 239 
Anceya rufocincta E. A. Smith 
Syrnolopsis (Anceya) giraudi var. E. A. Smita, 1890, Ann. Mag. Nat. Hist., 
(6) VI, p. 94. 
Anceya rufocincta E. A. Smrru, 1906, Proc. Zool. Soc. London, I, p. 183, Pl. x, 
fig 12: 
Lake Tanganyika: in 10 fathoms at Kirando near the southeastern end of the 
lake (type locality; W. A. Cunnington Coll.). 
The shell has about the size and contour of A. giraudi and A. bella, 
and is similar in sculpture. In the smallest and largest specimens before 
us there are eleven and thirteen ribs on the penult whorl. The speci- 
mens seen are “dead” shells, white with rufous bands below the suture 
and above the carina. In the form of aperture and the expanded, thick- 
ened peristome it is similar to the other Anceyx. The columellar fold is 
well developed but perceptibly smaller than in A. admirabilis. 
Length, 8.5 mm.; diameter, 2.5 mm.; length of aperture, 2.0 mm.; 13 whorls. 
Smith’s type specimen. 
Length, 12.2 mm.; 13 whorls, the apex lost. 
Length, 9.0 mm.;. 9 whorls, the summit truncate. 
The exact locality of our specimens (L. Stappers Coll.) was not 
given. The band above the basal keel was not mentioned in Smith’s 
description. 
Subgenus Burronitia E. A. Smith 
Burtonilla EH. A. Smrru, 1904, Proc. Malacol. Soc. London, VI, 2, p. 97. Mono- 
type: Turbonilla (?) terebriformis E. A. Smith. 
Anceya (Burtonilla) terebriformis (EH. A. Smith) 
Turbonilla (?) terebriformis FE. A. Smiru, 1890, Ann. Mag. Nat. Hist., (6) VI, 
p. 95. 
Burtonilla terebriformis E. A. Smiru, 1904, Proc. Malacol. Soc. London, VI, 2, 
p. 97, fig. 2 (on p. 87). ANcry, 1907, Bull. Scientif. France et Belgique, (5) IX, (1906), 
p. 255. : 
Lake Tanganyika: described from the lake without more definite locality. 
We have not seen this species. It is an acuminate, strongl7 ribted 
form, differing from the typical Anceyx by having more whorls, and 
by the roundly subangular instead of carinate last whorl. 
Length, 12.0 mm.; diameter, 2% mm.; about 18 whorls. 
MartTewia Dautzenberg 
| Martelia DavuTzENBERG, 1908 (March), Journ. de Conchyl., LV, (1907), p. 328. 
Monotypic for M. tanganyicensis Dautzenberg. 
Similar to Anceya in being axially ribbed, but far more minute (about 3 mm. 
long) and more conic, of 6 to 744 whorls. Columellar fold very strongly developed. 
