152 
MUREX tuberosus. 
TAB. DLXXVIII.— fig. 4. 
Spec. Char. Ovate, pointed, transversely striated; 
one row of blunt tubercles upon the upper 
part of each whorl ; whorls squarish ; spire 
as long as the last whorl ; beak produced. 
A general bluntness in the outline of this shell gives 
it some resemblance to a tuberose root. The length of the 
aperture is about equal to the diameter of the last whorl, 
which is something greater than the length of the spire. 
Casts in compact oolitic limestone, with small portions 
of the shell replaced by calcareous spar, are not unfre- 
quent in the Pisolite at Malton. We have never met with 
a specimen sufficiently perfect to determine the form 
of the beak by, or even to ascertain for certain the true 
genus to which to refer the species. 
MUREX Harpula. 
TAB. DLXXVI1I.— /g. 5. 
Spec. Char. Obovate, squarish, pointed at both 
ends, decorated with numerous longitudinal 
ribs ; spire very short, aperture nearly orbicu- 
lar ; beak straight. 
Close, thin, oblique ribs, squarish whorls, broadest 
towards the base, and a small spire, are the prominent 
features of this pretty Murex. The ribs are extended 
quite over the base, where their number is increased 
by the irregular insertion of shorter ones. The speci- 
men is very imperfect, the aperture particularly being 
incomplete. 
Taken out of the Carboniferous Limestone of Bradley, 
and now in the cabinet of H. T. De la Beche, Esq. 
