GASTEROPODA. 4 
anfractu unico rapide crescente ; apice lateral: apertura faciem 
inferiorem adequans ; labro prope spiram membranaceo ; columella 
laxé intro spiram volvente et eam penitus exhabente. 
Axtmat nearly enveloping the shell, very long compared with the 
two preceding, the lower portions ochreous brown, the mantle of the 
same colour, closely mottled with jet black; foot high, compressed 
above, and generally undulating along the back, rarely extending 
itself so as to be regularly tapering ; tentacles very dark slate-colour, 
with a darker central portion extending along the cervical ones, which 
are long and tapering, to some distance under the mantle; oral pair 
very short ; a slight furrow surrounds the foot, the margin of which is 
rather lighter-coloured than the rest of the body; respiratory orifice 
very small; mucus-pore very small, and placed just above the termi- 
nation of the foot. 
Suet. transparent, thin, flexible, of a beautiful sap-green towards 
the spire, gradually turning to yellow near the lip. Haliotiform, the 
spire sub-terminal, not forming an entire revolution, and wholly visible 
internally. Aperture enormous, occupying the whole face of the 
shell; lip thin and membranous, inflexed from the columella for about 
one-third its extent. 
Diameter five-eighths of an inch; axis one-tenth of an inch. 
Found by Mr. Couthouy on the Pico de Ruivo, Madeira, thirty 
feet from the summit, 6210 feet above the sea, under moss, at the roots 
of Erica arborea. Only two specimens were obtained. 
This is a very large and well-marked species. It is closely allied 
to V. Lamarckii, but the shell, as well as the animal, is sufficiently 
distinct. [J. Pp. c.] 
Figure 7, the animal extended ; 7 a, the animal retracted in the 
shell; 7 4, back of the shell; 7 c, aperture of the shell; 7 d, profile of 
the shell. 
VITRINA MARCIDA (Gould). 
Testa sigaretiformis, tenuis, sub-opaca, flavo-viridis, depresso-orbicularis, 
tenuiter striata, sub-perforata: spira anfractibus ad tribus convext- 
