225 
MUREX rugosus, var. (£.). 
TAB. CXCIX— Figs, l and 2. 
Spec. Char. Elongated, subfusiform, transversely 
and uniformly striated ; spire pointed, with 
about 12 longitudinal costae ; volutions ventri- 
cose ; beak short, open. 
Syn. Murex rugosus. Parkinson , III . 64. £. 5. 
/ 16 . 
Above twice as long as wide : in this variety the last 
whorl is nearly free from costae or undulations, it is 
drawn out into a short straight beak ; the outer lip is 
thickened, but appears to have no striae within its edge ; 
aperture elliptical. 
The larger specimen (fig. 1) is in Mr. Parkinson’s col- 
lection ; it is 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. Char. Subturrited, transversely striated, 
longitudinally costated ; whorls rather ventri- 
cose ; aperture ovate, expanded towards the 
beak ; beak very short, spreading ; costm nu- 
merous, slender. 
There are about 18 costae or undulations around the 
spire : the striae are sharp and numerous : the aperture 
is about as long as the shell is wide, that is, a little more 
