94 
CIRRUS nodosus. 
TAB. CXLL—Fig. 2. 
Spec. Char. Acutely conical, spire reversed, with 
two obscure transverse carinae, upon which are 
numerous longitudinally extended tubercles ; 
aperture orbicular. 
1 here are two rows of tubercles on each whorl, formed 
by the intersection of transverse and longitudinal ridges, 
the upper row is the largest, and the other is inconspi- 
cuous : the aperture seems from the cast to have been 
somewhat plaited. 
Dr. Leach, at present so well known for his extensive 
researches into Natural History, some years since pre- 
sented me with this specimen, picked up near Yeovil ; it 
is a reverse shell, and seems to have been gregarious : 
two were here crow ded together : there were signs of 
Ammonites in the mass. It has had apparently a very 
acuminated spire, seven turns of which remain, and the 
space above for as many more, according to the general 
proportions. 
CIRRUS plicatus. 
TAB. CXLL —Fig. 3* 
Spec. Char. Conical, transversely striated, base 
angular ; sides flattened ; umbilicus plaited or 
deeply striated ; aperture oblong. 
B ase rather broader than the height ; the aperture is 
subquadrangular, and wider thap it is long. The angu- 
lar form of the outer edge giving a flatness to the cone 
it would form if perfect, will help to distinguish this 
species : the lines of growth are indistinct, the creases or 
plaits in the umbilicus, which is rather small, and looks 
as if formed by the curvature of the shell, are a help to its 
name. 
From Folkstone, by favour of Mr. Gibbs : it has, like 
other productions of that place, some of the original shell 
remaining, which is occasionally finely iridescent ; the 
present is rather chalky. The inside cast is a mixture of 
ironey clay with lime. 
