105 
This species is found at Barton Cliff; it differs a little 
from Brander’s excellent figure in the characteristic space 
pn the upper part of each whorl, and the less acuminated 
beak, but it can only be a variety. I have seen part of 
a cast in micaceous sand, from the Devizes Canal, very 
like this, but it had not the collar, if I may so term it. 
PLEUROTOMA acuminata* 
TAB* CXLVI. — Fig. 4 . 
Spec. Char. Turreted, acuminated, longitudinally 
ribbed, transversely striated; whorls above* 
concave, edge fimbriated ; below sulcato- 
striated ; aperture elongated, canaliculated* 
one third the length of the shell ; beak broad. 
The costas are numerous, pretty close and a little waved ; 
the edges of the whorls are elegantly marked by the lines 
of growth so as to appear fringed ; volutions about nine * 
width equal to about one-fifth of the length. 
The narrowness of this shell and difference in other 
respects, from Brander’s Murex macilentus, or any other 
of his shells, seems to confirm it as belonging, exclu- 
sively, to some other place ; it was found at High gate* 
It is a curious fact that different places, frequently in 
the same country and of a similar formation, should hav$ 
such specific distinctions. 
PLEUROTOMA comma, 
TAB* CXLVI— Fig. 5. 
Spec. Char. Turreted, beaked, with acute trans- 
verse rising lines ; volutions smooth in the 
middle, with many short curved costas ; aper- 
ture ovate, canaliculated ; beak slightly curved. 
The costae extend only over the smooth part of the 
Whorl, they are swelled at the upper part, curved and 
pointed below, something like a comma; the rising lines 
are few, sharp, even and most prominent near the mid- 
dle of each turn : aperture about two-fifths the length of 
the shell 
Stubbington has afforded this shell to Mr. Holloway, 
and I figure it at present as rare, not knowing that it has 
been found elsewhere. 
