59 
HAMITES plicatilis. 
TAB CCXXXIV.—Fig. 1. 
Spec. Cuar. Slightly depressed, with numerous 
annular ridges ; two rows of large, equal, flat, 
tubercles upon each side ; curvature gradual. 
'T ue tubercles are possibly the rudiments of spines like 
those upon Hamites armatus ; each one is so large as to 
extend over three of the annular ridges and flat; the 
ridges continue all round without dividing, and are very 
regular ; the space between each tubercle is occupied by 
two of them. 
I have figured this from the extensive collection Miss 
Benett has formed for scientific purposes ; it was found 
in Chalk Marl, at Bishopstrow, near Warminster. 
Ai fig. 2 is a representation of a fragment, which I 
conceive belongs to H. armatus (see tab. 168) it serves 
to shew the great size that species may attain to. My 
friend, G. B. Snow, Esq. picked it up on the Isle of 
Wight last year. 
