52 
MUREX cristatus. 
TAB. CCXXX.—Figs. 1 & 2. 
Spec. Cuar. Ovate, transversely striated ; longi- 
tudinal, coste prominent, sharp, with three 
large plaits in each; the upper plait subspini- 
form, beak curved. 
Tae expanded lip that completes each successive pe- 
riod of the growth of this shell is very prominent, and 
forms a series of canaliculated spines upon the spire, in 
the proportion of six to each whorle; the spire extends 
to about one-third the whole length of the shell, and is 
sharp; the aperture is oval. 
This species, as far as I have yet been able to learn, is 
peculiar to Highgate, from whence I have received good 
specimens, through the kindness of my esteemed friend, 
G. B. Snow, Esq. whose name I have had repeated oc- 
casions to mention. 
MUREX coronatus. 
TAB. CCXXX.—Fig 3. 
Spec. Cuar. Oblong, transversely furrowed ; 
costze numerous, sharp ; upper part of the vo- 
lutions concave, bounded by a sharp ridge, 
and a strong spine upon each of the coste. 
Tex sharp ribs give a polygonal aspect to the spire, at 
the same time the spines upon them standing up around 
the concave space at the top of each whorle, form a kind 
of crown to it. The beak is slightly curved, and the 
outer lip crenulated. 
From Highgate hill, where it is not very rare. 
