MOLLUSCOUS A N IM A L S .
a i " i
H e l ic in a O X Y T R O P IS , f . 3 8 . / . 2 4 .
Shell suborbicular, rather depressed, smooth, carinated, pale y e llow ; sp ire depressed, conical, o f four
sharp keeled volutions ; ape rture wide, sharply angular a t its o ute r edge.
H e l i c in a s o l id u l a , t. 3 6 . / . 2 0 .
Shell nearly globular, smooth, solid, thick, yellow, spire of four ra the r ventricose volutions, the last
large, obtusely keeled ; aperture rather small, th ick -lip p ed , obtusely angular a t its outer edge.
A u r i c u l a p a l l i d a , t. 3 8 . / . 2 7 .
Sliell ovate, oblong, almost colourless, smooth, slightly longitudinally striated ; apex acuminated ; spire
very short, o f six whorls, th e last o f these four tim e s as long as ihe spire ; peritreme thickened, outer lip not
reflected ; anterior p a rt of the columellar lip reflected over the small um b ilicu s; front of the columella w ith
one d istinc t fold and another, nearly obsolete, placed anteriorly to it.
M e l a m p u s p a l l e s c e n s , t, 3 8 . / . 2 8 .
Shell obovate, white, very smooth, covered with a pale greyish yellow pe riostra cum; spire short, consisting
of seven o r eight w horls, abru p tly acuminated a t the a p e x ; last whorl very large, rounded, angular near
the h inde r pa rt, b lu n t an te riorly; aperture elongated, narrow, rather more so posteriorly than an te rio rly ;
outer lip thickened inwardly, with five or six b lu n t te e th ; columellar lip with three or four rather irregular
blu n t folds.
C y c l o s t o m a im m a c u l a t u m . t. 38. / . 29. Sowerhy, Species Conchyliorum. P a r t
I I . Cyc/osioma,/ . 124.
Shell globoso-conical, thin, pellucid, nearly white, smooth, spire acuminated, o f five rounded w h o rls ;
last whorl v en trico se ; aperture nearly c ircu la r; peritreme reflected, w h ite ; umbilicus small.
H ab . L u 9on.
C y c l o s t o m a a l b i c a n s , i. 38. / . 30. Sowerhy, Species Conchyliorum. P a r t II.
Cyclostoma, f . 194, ^95.
Shell nearly globular, whitish, with an o btuse spire consisting of five rounded whorls, spirally grooved on
the u p p e r p a rt, very smooth b e low; aperture nearly circular, ra the r acuminated posteriorly, peritreme thickened,
somewhat sinuous above, anterior pa rt o f the outer edge thickened and reflected ; inne r edge with an
angle on the side of the umbilicus, which is large and smooth within.
In h ab its some of the islands o f the Southern Pacific.
C y c l o s t o m a f i l o s u m , f. 38. / . 31. Sowerhy, Species Conchyliorum. Cyclostoma,
/ . 16.
Shell o f a somewhat conical orbicular form, its spire rather shorter than the aperture, thickish, of a pale
colour, with five rounded, longitudinally striated and carinated whorls; the two more prominent keels speckled
with reddish brown, the lower one running along the suture, which is otherwise very in d is tin c t; aperture
circular, peritreme ra the r thickened, sinuated a t the u p p e r pa rt, and ra the r angular, forming a v ery short, inconspicuous
canal, edge rather obtuse ; umbilicus large, deeply grooved within, its edge with two prominent
keels.
H ab . India .