1927] Pilsbry-Bequaert,. The Aquatic Mollusks of the Belgian Congo 289 
anteriorly at the sides, narrower and rounded behind. Above of a semi- 
_ transparent smoky appearance, mottled with yellowish specks, uniformly 
pale beneath. On removing the animal from its shell the mantle is seen 
to be of a bright-green tint, excepting the margin, which is yellowish. 
The liver also is of a similar verdigris-green colour.’ In C. exarata the 
foot is a little more pointed behind. 
Cleopatra has an operculum similar to that of many Tanganyikan 
melanians. In character of the radula it is rather between the groups with 
short and those with long side teeth. It appears to be an unspecialized 
group related to the Tanganyikans. 
Cleopatra has often been associated with the Viviparide, but the: 
external form and coloration of the animal and the characters of the 
radula are purely melanid. 
Fig. 50. a-c, Teeth of Cleopatra bulimoides (Olivier): b, detached lateral tooth; 
c, detached marginal. 
This genus is peculiar to the Ethiopian and Malagasy Regions. It is 
especially abundant in species in the basins of the Nile, Lake Chad, and 
Congo, and in East Africa (Map 4). In West Africa only one species 
is recorded from Senegal (C. senegalensis) and, as it has not been figured 
and was not mentioned again since Morelet’s time, it is a somewhat 
doubtful form. Apart from this, the westernmost record of any member 
of the genus is the region of Timbuktu, whence Germain reported C. 
bulimoides var. tchadiensis (1909, Bull. Mus. Hist. Nat. Paris, p. 470). 
The genus does not appear to go farther south than Angola’ in the west, 
1Kobelt (1909, Abh. Senckenberg. Naturf. Ges.,X XXII, p. 80) lists a Cleopatra moniliata Morelet, 
of Angola. We have been unable to find where this species was described. 
