FOSSILS OF THE MARL. 
159 
Of the simple univalves, the shells of the genera 
voluta, buccinum, rostellaria, auricula, and trochus 
are the most remarkable. 
In this division of the chalk the multilocular ge- 
nera nautilus, hamites, ammonites, scaphites, and 
tiirrilites, appear in great numbers, aud iu many 
localities are by far the most abundant of the or- 
ganic remains. We subjoin figures of two species 
of turrilites. 
TURRILITES FROM IIAMSEY. 
1. Turrilites tuberculata. 2. Turrilites undulata. 
There are, probably, no localities in England so 
rich in the various species of turriliteSy as the marl 
pits in the vicinity of Lewes ; and the first British 
specimens of the genus, as well as of scaphiteSy 
were found by the writer in Hamsey marl banks. 
A specimen of turrilites tuberculatay nearly two 
feet long, the only instance in which traces of the 
siphunculus are visible, was discovered in a marl 
