12 MOLLUSCA. 
Diameter one-third of an inch ; axis one-eleventh of an inch. 
Found by Mr. Couthouy at Kauai, Sandwich Islands. 
It is much like V. pellucida, but is larger, more opaque, and the 
aperture is larger, in consequence of the basal portion of the lip 
making a more convex curve. 
Figure 10, the front; 10 a, the back; 10 0, the base of the shell, 
enlarged; 10 c, natural size of the shell. 
Virrina FuRVA (Lowe) Gould. 
Helix furva, Lowe; Primit. Faune Mader. 40, pl. 5, f. 2. Drsuayes, 
in Lamarck, Anim. sans Vert., vill. 96. 
Animat a very pale salmon-colour, projecting very little behind the 
shell. Cervical tentacles very long and slender, slaty black, with a 
still darker line along their posterior face down to the shell; eyes very 
minute, on a slight terminal bulb; oral tentacles very short, dark, and 
with a black line running backwards along the cheeks and neck. 
Respiratory orifice rather small, situated at the posterior and inferior 
edge of the mantle, which is but slightly developed, and scarcely 
protrudes from the shell. Genitalia at the base of the oral tentacles, 
between them and the cervical tentacles. [J. Pp. c.] 
Found by Mr. Couthouy, about four miles from St. Anna, Madeira, 
in a mountain pass. 
From the shell itself (which is immature), as well as from Mr. 
Couthouy’s description of it, I suppose it to be the Hehz furva of 
Lowe. I introduce it here, on the authority of Mr. Couthouy, who, 
from examination during life, decides that it is “‘a Vitrina belonging 
to the division capable of being wholly contained in the shell.” I 
should rather have arranged it with Succinea, allied to the peculiar 
helicoid form of that genus found in Brazil. The structure of both 
the animal and the shell justify its removal from the genus Helix. 
