30 
HAMITES tuberculatus. 
TAB. CCXVI.---Figs. 4 and 5. 
Spec. Cuar. Depressed, undulations unequal, every 
third one largest, with two tubercles on each 
side, the lateral ones obscure ; curvature gra- 
dual: 
"Two small rings between each of the tuberculated ones, 
almost constantly occur upon this ; the tubercles are ob- 
tuse; in other respects it nearly resembles the last. 
From Folkstone, by Mr. Gibbs, 
HAMITES turgidus. 
TAB. CCXVI.---Fig. 6. 
Spec. Cuar. Depressed; front irregularly swelled ; 
undulations regular, disappearing over the 
hack ; two rows of obscure tubercles near the 
front ; curvature rather sudden. 
W aerner the irregular swellings on the front be acci- 
dental or not, the single row of tubercles on each side of 
it are sufficient to distinguish this species: they are 
placed upon every other ring, and are small. 
A pyritous cast ; from Folkstone with the last. 
HAMITES nodosus. 
TAB. CCXYI.---Fig. 3. 
Spec. Cuar. Nearly round, undulations regular ; 
two rows of obtuse tubercles upon the front, 
each tubercle placed upon two undulations ; 
aperture obovate. 
More gibbose than any other tuberculated species ; the 
tubercles are so large that they extend over two of the 
undulations or rings, which are not so numerous as in 
some others, and leave a simple one between each pair. 
A cast in which the septa are coated by crystallized 
Pyrites ; the pearly shell remains outside. From Folk- 
stone. 
