72 CLASS GASTEROPODA. 
penis, are tolerably long, but it has no operculum. MM. 
(uoy and Gaymard have observed an appendage on its poste- 
rior portion, which enters the furrow of the whorls. 
The remainder of the genus voluta was afterwards divided 
into five by M. de Lamarck, exclusive of the tornatelle and 
pyramidelle already mentioned. 
VOLVARIA, Lam., 
Closely resembles the oliva in its oblong or cylindrical form ; 
but the aperture is narrow, and its anterior edge ascends to the 
top of the spire, which is excessively short. There is one 
fold, or several, at the foot of the columella. The lustre and 
whiteness of this shell are such that on the coasts it is used 
for making necklaces. (Volv. monilis, Lin.) A small fossil 
species is found in the vicinity of Paris. (Volvaria bulloides.) 
VOLUTA (proper), Lam. 
The aperture is ample, and the columella marked with 
large folds, the one farthest from the spire being the largest. 
The degree of projection in the spire varies greatly. 
In some of them, CymMBiuM, Montf.; CyMBA, Sowerb., 
the last whorl is bellied. ‘The animal has a large thick and 
fleshy foot, without operculum, and a veil on the head, from 
the sides of which issue the tentacula; their eyes are on this 
same veil, outside of the tentaculum; the proboscis is toler- 
ably long, and there is an appendage on each side of the base 
of the siphon. They attain a large size, and many of them are 
extremely beautiful. (Volv. Avthiopica, List. 797. 4., &c.) 
In others, VoLUTA, Montf., the last whorl is conical, be- 
coming narrower at the extremity opposite the spire. (Voluta 
musica, List., &c.) The foot of the animal is not so large as 
that of the preceding ones; their shells are frequently remark- 
able for the beauty of their colours, or the figures traced on 
them. 
