143 
Body whorl, obliquely roundly pyramidal, with ten spiral 
cords rounded, about half as wide as the interspaces, crossed 
by 26 axial lamelle, which form rounded tubercles at the 
junction, and coronate t.:e stouter cord at the angle. Finer 
microscopie axial strie cross the interspaces between the 
lamellæ. 
Aperture obliquely oblong, narrowed and deviated to the 
left anteriorly, where it ends in a moderate-sized notch. Pos- 
teriorly square, external lip simple, thin, corrugated by the 
spiral ribs, uniformly slightly curved. Columella nearly 
straight, with two oblique anterior plates, inner lip as a thin 
glaze, not obliterating the spiral ribs on the base of the whorl. 
Colour, uniform dark chestnut-brown. 
Length, 10 millimetres; breadth, 5. Aperture length, 45 
mm.; width, 3. 
Hab.—St. Vincent Gulf, 17 fathoms, 2 broken, 1 re 
cent; Backstairs Passage, 17 fathoms, 1 alive, 3 dead; 22 
fathoms, 2 dead. 
Stephopoma nucleogranosum, sp. nov. PL хху 108 iie 12, Los 
Shell attached, solitary, or conglomerate. Nucleus horn- 
coloured or white; nautiloid, of one turn and a half; dia- 
phanous, slightly effuse at its aperture; covered with minute 
granules, arranged in crowded lines corresponding with the 
accremental lines. The shell springs from within the slightly 
trumpet-shaped mouth, which projects all round and marks 
off the embryonic shell from the next whorl. Two and a half 
of these follow in the same plane, rather rapidly enlarging, 
and attached to tbe surface on which the shell rests; then 
come one or two whorls, coiled above and adhering to those 
below ; and, finally, a free, more or less twisted tube, varying 
up to an inch in length. Тһе attached whorls along their 
outer under surface throw out numerous scales of attach- 
ment at irregular intervals. The adherent whorls have a 
pronounced rounded carina along their upper outer part, 
which gradually becomes less valid along the free tube, until 
it may be indistinguishable. From this carina the side is 
flat to the carina of the whorl below, so that a young shell 
has the shape of a short cylinder fixed by one end on the 
rock, etc. There are moderately developed accremental striæ, 
which become ruder and rounder on the free tube. 
Aperture circular, or very slightly elliptical. 
Colour translucent white. Some are tinged more or less 
with pinkish-chestnut. 
1 Operculum horny, multispiral; nucleus central, setigerous. 
Sete comparatively narrow beyond the base of attachment, 
