GASTEROPODA. 9 
Figure 12, dorsal view, with the animal extended ; 12 a, front of the 
animal; 12 4, base of the shell; 12 c, edge of the shell. 
VITRINA NITIDA (Gould). 
Testa depresso-globosa, heliciformis, tenuissima, pellucida, nitidissima, 
levigata, succineo-viridis, imperforata: spira anfractibus quatuor 
convexis, ultimo amplo ; apice subcentrali, exserto ; sutura excavata : 
apertura transversa, subcircularis ; peristomate inflexo; columella 
arcuatd, usque ad apicem perspicud. 
AntmaL of a uniform slaty-brown, except the mantle, which is 
smooth, almost black, and so small as to leave the shell almost entirely 
exposed ; anterior part of the body with nine or ten oblique lines or 
furrows on the neck. Tentacles black, the cervical ones very long 
and slender; the oral ones about one-third as long; a black line 
extends a short distance upon the neck from the upper pair of tentacles. 
Foot very short posteriorly, and tapering ; mucus-pore imperceptible. 
SHELL sigaretiform, transparent, glistening, brownish-yellow, tinged 
with bright green at the summit, which is darker than the rest. Vo- 
lutions four, axis prominent, submedian; sutures deeply impressed. 
Aperture ample ; lip slightly involute, continuous with the columella, 
which extends into the spire. No trace of any umbilical indenture. 
Greatest diameter less than half an inch ; axis one-eighth of an inch. 
Obtained by Mr. Couthouy above Roche de Empefia, towards Pico 
de Ruivo, Madeira, at an elevation of 4240 feet. 
A most elegant and brilliant species, closely resembling V. marcida. 
The animal differs chiefly in the mucus-pore not being perceptible, 
and the absence of the fissure on the back of the foot. The corselet 
is, however, a great deal smaller, never, as in that species, wholly 
concealing the shell. [. p. c.] 
Figure 8, top of shell, with the animal; 8 a, base of the shell; 8 3, 
profile of the shell. 
3 
