GASTEROPODA. 161 
About the size of N. betica, but more globose and solid; the inner 
lip is less extended, and yellow instead of bluish, and it also has the 
white specks by which alone it may be recognised. In N. detica the 
opercle is flesh-coloured. 
Figures 190, 190 a, two views of the shell. 
NERITINA CANALIS (SowERBY), T'ankerville Catalogue; and Conch. 
Illustr., f. 22. Lamarck; An. sans Vert., viii. 584. 
AnimaL very dark purple above, mottled with a few small paler 
spots, a series of which extends along each side of the head; head 
broad, sinuate in front, beneath reddish-violet, lips flesh-coloured ; ten- 
tacles long and slender, annulated beneath with black; eye pedicles 
short, whitish ; mantle very dark violet; disk of the foot pale reddish. 
Figure 182, animal seen laterally, and 1824, from beneath. 
NERITINA GRANOSA (SowERBY), Conch. Illustr., 6. DEsHAYEs in 
Lamarck, An. sans Vert., vill. 583. 
ANIMAL large; disk of the foot cream-coloured ; head short, broader 
than the foot, crescentic, grass-green radiated and margined with 
white; lips paler; mantle very much developed, far surpassing the 
foot, scalloped at the edges, and transversely lineate with dusky, so as 
to appear somewhat convoluted ; tentacles long and slender, dark, with 
a pale line underneath ; eye pedicles very robust, pale beneath. 
Figure 179, the animal as seen from beneath. 
Neririna TalTENsis (SouLEYET), Voy. de la Bonite. 
ANIMAL as seen beneath, grayish-olive ; mantle dark purplish; head 
rose-red, yellowish at the lips; tentacles short, olivaceous; eye pedicles 
large, cylindrical ; mantle dark purplish. 
The shell to which this animal belongs is evidently the same as 
41 
