153 
HAMITES armatus. 
TAB. CLXVIII. 
Srec. Cuar. Flatted; undulations simple, every 
second or third armed with a large thick spine 
on each side near the front. 
Besives the two spines upon every third undulation, 
there are two obscure tubercles near the back upon the 
same ring, the intermediate undulations are less risen, 
and are almost lost upon the back; the section is ellip- 
tical. 
This large and remarkable Hamite was found in Chalk 
Marl at Roak village, near Benson, Oxfordshire, and 
sent me for publication by the Rev. William Buckland. 
It is extraordinary, more from the spines or thorns it is 
beset with than from its size, although this much exceeds 
that usually attained by species of the same Genus in 
England. The spines are three-eighths of an inch long, 
being one-third the length of the section at the largest 
end of the shell. The specimen is a cast stained with 
iron, it has not preserved any indications of the septa. 
The specimens next in size at present known, are 
found in the Chalk marl of Sussex, but still more muti- 
lated: we hope to give good specimens ere long. It would 
be an acquisition to find one perfect at the ends—such not 
having been seen. 
