63 
CARDIUM turgid um. 
TAB. CCCXLY1. — Fig. 1. 
Spec. Char. Obovate, transverse, smooth, gib- 
bose ; anterior side longitudinally striated ; 
edge minutely toothed. 
Syn. Cardium turgidum. JBrander , 96. 
An elegant almost orbicular shell, whose surface is in 
part very even and smooth, but marked with fine lines 
concealed beneath it, and which are rather hollow near 
the margin : the anterior side has 20 or 30 furrows cut 
longitudinally into it, so close together as to leave only 
sharp highly elevated lines between them : the teeth upon 
the edge are blunt, they are largest at the ends of the 
above mentioned furrows ; the width exceeds the length 
a trifle, and the anterior side is slightly truncated. 
This seems to be one of the few shells belonging to 
the London Clay, only described by Brander ; it pro- 
bably with several others is not found near Paris. May 
not the several formations that lie in strata, or coats, 
over the nucleus of the earth, have successive zones 
replete with the fossil remains of the animals, &c. pecu- 
liar to them, besides such as are universally distributed 
through them, which zones might be discovered by a 
diligent comparison of the fossils of different countries, 
and indicate the probable position of the poles previously 
to the destruction of life in those strata, for the order 
and perfection of many of the remains seem to indicate 
that they are not far removed from their original sites. 
The shell before us has been presented to me by Miss 
Beminster, and several other friends, who have picked 
it up at Barton. 
