ORDER PECTINIBRANCHIATA, Sl 
and the columella is without folds, they are the Pyruta, 
Lam. 
Some are umbilicated: Mur. rapa, Martini, &c. 
And others not: Bulla ficus, L., &c. 
From these pyrule Montfort again separates the species 
with a flattened spire, internally striated near the lip, by the 
name of FULGuUR. ‘They are a sort of pyrule with a folded 
columella, the folds being sometimes almost insensible. 
(Murex perversus, L., &c.) 
Among these divisions of the fusi of Bruguiéres, the Fascro- 
LARIZ, Lam., are distinguished by some oblique and well- 
marked folds on the columella, near the origin of the siphon. 
(Mur. tulipa, L., &c.) 
TURBINELLA, Lam., 
Also consists of shells with a straight canal, but without varices, 
distinguished by the large transverse folds on their columella, 
which extend the whole length of the aperture, and which 
closely approximate them to the conical volute; they only 
differ from the latter in the elongation of their aperture into a 
sort of canal: the line that separates them is not easily traced. 
(Mur. Scolymus, Martini, &c.) 
STROMBUS, Lin., 
Includes those shells with a canal that is either straight or re- 
flected towards the right, of which the external margin of the 
aperture dilates with age, but still preserves a sinus towards 
the canal, under which passes the head of the animal, when 
it extends itself. 
In most of them the sinus is at some distance from the 
canal. ‘They are subdivided by M. de Lamarck into two 
subgenera. 
VOL. XII. G 
