CONCHOLOGY. 147 
tinct folds. Inhabits the Indian Ocean. Twenty-four living 
species and nine fossil, according to Defrance. 
‘Marginella radiata. Marginella nubeculata. 
M. limbata. M. aurantia, 
M. lifasciata. M. longivaricosa. 
M. dentifera. M. eburnea. 
M. builata. M. persicula. 
M., avellana. M. tessellata. 
M. glabrella. M. cerulescens. 
M. quinqueplicata. M. bivaricosa. 
M. rosea. M. muscaria. 
M. faba. M. formicula. 
M. dactylus. M. lineata. 
M. cornea. M. interrupta. 
5. Genus Volvaria. Pl. XII. 
Animal. As above. 
Shell. Cylindrical, convolute; spire obsolete or concealed ; 
aperture narrow, extending the whole length of the shell, with 
one or more folds on the lower portion of the columella. Inhabits 
the Indian Ocean. Seven species. 
Volvaria pallida. Volvaria triticea. 
V. monilis. V. oryza. 
V. miliacea. V. bulloides. 
V. canaliculata. 
FAMILY XXI. 
Convotuta. Six genera. 
1. Genus Cyprza, Pl. XII. 
Animal. Oval, elongated, involute ; head provided with two 
very long conical tentacula; eyes at the extremity of an inflation 
which forms a part of them; a transverse buccal orifice at the ex- 
tremity of a kind of cavity, at the bottom of which is the true 
mouth between two thick vertical lips; a lingual band, bristled 
with small teeth, and prolonged into the abdomen. 
