436 PYRAMIDELLID. 
united leaf; in its congener they are more triangular, less, 
though greatly, membranous, do not unite above half their 
length, and have very obtuse terminations. The C. pusilla 
has a palish purple streak on each tentaculum and on each 
side the rostrum; this fact is not without its value, as it 
proves pretty clearly that the’ rostrum belongs to the neck 
and tentacula, and not to the foot: in the C. elegantissima 
both the same parts are hyaline-white. They both mhabit 
the same littoral levels at Littleham Cove, Exmouth. 
The addendum to the preceding species will apply to this ; I” 
have only to observe, that the constant variations in the colour, 
contour, and texture of the shells have been verified by the 
examination of nearly twenty live individuals of this species. 
Cu. cLavuLa, Loven ? 
Eulimella clavula, Brit. Moll. iii. p. 314, pl. 98. f.8; and iv. p. 283. 
The animal inhabits a pearly-white, but not glossy shell of 
five rather rounded volutions, including the moderately re- 
flexed apex. The body-whorl is about half the entire length of 
the shell, with a narrowish, elongated, oval aperture, quite free 
from angularity. The animal is clear frosted-white. Rostrum 
very narrow, rounded at the end, not bilobed nor grooved, and 
carried just before the foot ; neck greatly protruded, showing, 
on the march, an open canal formed of two parallel longitudinal . 
lines. Manile even: no fold visible. Tentacula short, broad, 
swelling out behind like a minute wide leaf; the auriform 
folding nearly disappears on the march; they are not diver- 
gent ; indeed, I may say, they are borne so close and straight 
as almost to hide the rostrum and proboscidal fissure; they 
may be termed small, short, triangular, and terminate each 
with two white inflations, that is, one completely apical, the 
other close below it quite lateral, subsemicircular, and as if 
soldered to the external sides of the pomts. I do not recollect 
having before observed this tentacular peculiarity. The eyes 
are at the internal bases, not very close together. The foot is 
avery deceptive organ, from its quality of exhibiting different 
appearances ; it is very little concave in front, and has long 
