225 
MUREX rugosus, var. (¢.). 
TAB. CXCIX—Figs. 1 and 2. 
Spec. Cuar. Elongated, subfusiform, transversely 
and uniformly striated ; spire pointed, with 
about 12 longitudinal costz ; volutions ventri- 
cose ; beak short, open. 
Syn. Murex rugosus. Parkinson, III. 64. t. 5. 
f. 16. 
A nove twice as long as wide: in this variety the last 
whorl is nearly free from coste or undulations, it is 
drawn out into a short straight beak ; the outer lip is 
thickened, but appears to have no striz within its edge ; 
aperture elliptical. 
The larger specimen (fig. 1) is in Mr. Parkinson’s col- 
lection ; itis from the Crag, near Malden: the smaller 
one (fig. 2) I picked up at Plumstead from among sandy 
gravel. 
MUREX costellifer. 
TAB. CXCIX.--- Fig. 3. 
Spec. Cuar. Subturrited, transversely striated, 
longitudinally costated ; whorls rather ventri- 
cose ; aperture ovate, expanded towards the 
beak ; beak very short, spreading ; cost nu- 
merous, slender. 
Taurre are about 18 coste or undulations around the 
spire: the striz are sharp and numerous: the aperture 
is about as long as the shell is wide, that is, a little more 
of a | 
