yd 
236 Bulletin American Museum of Natural History [Vol. LI1I 
Lake Tanganyika: near Mlilo on the western shore (type locality; Giraud Coll.) ; 
Mpala (Guillemé Coll.); Albertville (Charles Hedley Coll.); Kasakalawe (L. 
Stappers Coll.). | 
Bourguignat’s types of A. giraud: and A. admirabilis were either 
young shells which had not formed a final peristome, or individuals in 
which the peristome had been broken, and was more or less restored in 
his figures. The measurements he gave make A. giraudi the more slender 
of the two, but this is contradicted by the text and figures. , 
A. giraudt is represented as broader than A. admirabilis, with closer, 
straighter, and more numerous ribs. There is a palatal fold. Length, 
9.0 mm.; diameter, 2.0 mm.; 12 to 13 whorls. Bourguignat’s figure is 
dh 
Fig. 32 
a b c d | a 5 
Fig. 382. a-d, Anceya giraudi Bourguignat. Kasakalawe. | 
Fig. 33. a, Anceya admirabilis Bourguignat. b, A. giraudi Bourguignat. Copies 
of original figures. 
Fig. 33 
reproduced in our Fig. 33b. We imagine that his description was a 
composite of the two above-mentioned forms, which he discriminated 
later; and his measurements may have been from an A. admirabilis. 
We refer to A. giraudi a long series from Kasakalawe (L. Stappers 
Coll.) in which there is a palatal fold’ within the last whorl, in a latero- 
ventral position. It is only weakly developed, but is visible by trans- 
_ parence in most specimens, and is readily seen by breaking back a half 
whorl. The shape is variable, but generally stouter than the speci- 
mens we refer to A. admirabilis. The color is from cinnamon-brown to 
vinaceous-drab in specimens quite unworn but which may have lost a 
thin periostracum. The columellar fold appears strongly in the aperture, 
and ascends three whorls. 
The ribs are decidedly less curved than in A. admirabilis. They 
appear to be less numerous than in Bourguignat’s figure. 
