ORDER PECTINIBRANCHIATA. GL 
whitish, is very abundant on the coast of France. Add Tro- 
chus labeo, Adans., &c. &c. 
PHASIANELLA, Lam. 
Aun oblong or pointed shell, similar to that of several bulimi 
and lymnez ; the aperture also higher than it is wide, and 
furnished with a strong operculum; base of the columella sen- 
sibly flattened, but no umbilicus. 
They inhabit the Indian Ocean, and are much sought for 
by collectors, on account of the beauty of their colours. The 
animal is provided with two long tentacula, with eyes placed 
on two tubercles at their external base, and with double lips 
that are emarginated and fringed, as well as the wings, each 
of which has three filaments. (Buccinum tritonis, Chemn., 
&e.) 
AMPULLARIA, Lam., 
Have the shel] round and bellied; a short spire, as in most 
of the helices ; the aperture higher than it is wide, and pro- 
vided with an operculum ; the columella umbilicated. 
They inhabit the fresh or brackish waters of hot countries. 
The animal has long tentacula, and eyes placed on pedicles at 
their base. In the roof of the respiratory cavity, by the side 
of a branchial comb, according to the observations of Messrs. 
Quoy and Gaymard, is a large pouch, without an issue, that is 
filled with air, and may be considered as a natatory bladder. 
(Helix ampullacea, L., List. 130, &c.) 
The LAnist&, Montf., 
Are ampullaria, with a large, spiral, convoluted umbilicus. 
Ampulla carinata, Olivier, Voy. en Turquie. 
HeLicina, Lam. 
Judging by the shell, the helicine are ampullariz, in 
