1927] - Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 153 
Ancylus (Burnupia) caffer Krauss. B. Waker, 1912, The Nautilus, XXV, p. 
139. Conno uy, 1912, Ann. South African Mus., XI, p. 239. 
Burnupia caffra Krauss. B. WALKER, 1924, “Ancylide of South Africa,’ p. 31, 
figs. 7 (on p. 16), 18 (on p. 30), and 19 (on p. 33); Pl.t, figs. 1 and 2. 
Lubumbashi River, on dead LEtheria shells; Panda River, an 
affluent of the Lufira, at Likasi (both Michael Bequaert Coll.). 
The elevated shell has the somewhat hooked apex at the posterior 
fourth, and, viewed from above, much nearer to the right margin than 
to the median line. Anterior and left slopes are quite convex. The apex 
is dented near the top, and marked with radial series of punctures; the 
rest of the shell has fine, close, radial striz. 
Length, 4.8 mm.; width, 3.2 mm.; height,2.0 mm. Panda River. 
ey ees me 4.0 ie ates _ Lubumbashi River. 
The specimens have been compared with South African material, 
and the identification of those from the Panda River has been confirmed 
by Bryant Walker. 
Burnupia kimiloloensis, new species 
Plate XII, Figures 2 and 2a 
Kimilolo River near Elisabethville (Michael Bequaert Coll.). 
The shell is regularly elliptical, rather strongly elevated, moderately solid, pale 
cinnamon buff. The apex is at the posterior fourth of the length and left fourth of 
the width, and is somewhat. recurved, blunt, with a distinct apical pit and radial 
series of punctures. The later growth is finely but very distinctly striate radially, 
the striz slightly rippled. The anterior slope is very strongly convex, posterior slope 
concave above, then straight. The right slope is nearly straight, the left some- 
what convex. 
Length 6.4 mm.; width, 4.5 mm.; height, 2.4 mm. 
This is more strongly sculptured than other species of the region 
we have examined, but is similar in this character to the specimens of 
B. stenochorias which we have seen. It differs from the large form of B. 
stenochorias by the blunter summit, which in a dorsal view is decidedly 
farther from the left’: margin of the shell. B. caffer has a much more 
recurved apex than the present species. 
Burnupia alta, new species 
Plate XII, Figures 5 and 5a 
Kisanga River near Elisabethville (Michael Bequaert Coll.). 
The shell is thin, oval, the left outline a little more convex than the right, anterior 
end broadly rounded, posterior a little more narrowly so. The summit is blunt, with 
the apical pit conspicuous, havmg radially punctate sculpture, situated well towards 
