MOLLUSCA. 
Hamites. 
of large flattened tubercles, one of which is in the centre, 
and the other near the dorsal margin, producing a sort of 
undulous ridge on both sides, each separated by a slightly 
waved furrow ; curvature abrupt. 
Found in the Isle of Wight, by G. B. Snow, Esq. and in 
the Chalk Marie, near Benson, Oxfordshire, by R. Wright, 
Esq. 
Mr Sowerby considers this as the JI. Armatus; but we 
conceive that the single waved ridge separating the tubercles, 
in place of two or three ridges, is sufficient to distinguish it. 
5. II. armatus. — The Armed Hamite, pi. II. fig. 6. 
Sowerby, Min. Conch. II. p. 153, pi. 168; Buck land’s 
Bridgewater Treatise, II. pi. 44, fig. 9, 10. Mantell, Geology 
of Sussex, p. 121, pi. 23, fig. 3 and 4. 
Depressed; provided with nearly regular, continuous, 
transverse, simple ridges; and a row of flattened tubercles, 
nearest to the interior margin ; and another close to the dorsal 
limb, connecting which are high broad ridges ; on each side 
near the front a series of these are armed with long, subulate 
spines, thicker at the base, and tapering abruptly ; the limb 
of the other side of the curvature with simple, somewhat 
elevated tubercles ; the ridges are very indistinct on the dorsal 
region ; section elliptical; greatest diameter one inch and an 
eighth. 
Found in the upper Green sand at Rook village, near 
Benson, Oxfordshire, and in the Chalk Marie of Sussex. 
f 5. a the section. 
6. II. spiniger.— The Spined Hamite , pi. II. fig. 12. 
Sowerby, Min. Conch. III. p. 29, ph 216, fig. 12. 
Compressed ; with numerous, curved, slightly transverse, 
irregularly formed ridges; two rows of somewhat sharp 
tubercles on each side, placed near the dorsal limb, those 
nearest the front largest; these embrace several of the ridges 
into each of their bases, where they terminate, but some of 
which ascend the sides of the tubercles; aperture oval; cur¬ 
vature gradual; greatest diameter five-eighths of an inch. 
Found in marie near Folkstone. 
7. II. sPiNULOsus.—The Prickly Hamite, pi. III. fig. 5. 
Sowerby, Min. Conch. III. p. 29, pi. 216, fig. 1 ; Dentalium 
spinulosum, Miller’s MS. Catalogue. 
Compressed, with a gradual curvature, describing nearly 
the segment of a circle, and equally prominent regular undu¬ 
lations, which are nearly obsolete upon the narrow back, 
each alternate one provided with two sharp, slightly divergent 
spines, situate along each side near the front; aperture 
elliptical. 
Found at Blackdown, by Mr Miller. 
8. H. TUI3ERCULATUS. —The Tuberculated Hamite, pi. II. 
fig. 3. 
Sowerby, Min. Conch. III. p 30, pi. 216, figs. 4, 5. 
Compressed, gradually curved, with unequal undulations, 
each third one larger than the others, and provided with two 
obtuse tubercles on both sides, the lateral ones somewhat 
obscure; between each of the tuberculated rings are usually 
situate two smaller ones. 
This has much the aspect of II. spiniger, but differs in the 
above particulars. 
Discovered at Folkstone, by Mr Gibbs. 
9. II. turgid us.—The Turgid Hamite, pi. II fig. 8. 
Sowerby, Min. Conch. III. p. 30, pi. 216, fig. 6. 
Compressed, with an abrupt irregularly turgid front, and 
provided with two rows of small obscure tubercles on each 
side placed upon every alternate annulation, with regular 
annulations, which become obsolete over the back: Suffi¬ 
ciently distinguished by the single row of tubercles. 
Found at Folkstone. 
10. H. nodosus —The Knotty Hamite, pi. II. fig. 5. 
Sowerby, Min. Conch. III. p. 30, pi. 216, fig. 3. 
Shell nearly round ; externally pearlaceous ; with regular 
annular undulations; provided with two rows of obtuse 
tubercles placed upon the front, each tubercle seated upon 
two of the rings; each pair of annulations with a simple one 
between them ; aperture somewhat ovate. 
This shell is somewhat more inflated than its congeners, and 
the rings are not so numerous as in some other species. 
Found at Folkstone. 
11. H. tenuis —The Slender Hamite, pi. I. fig. 2. 
Sowerby, Min. Conch. I. p. 136, pi. 61, fig. 1. 
Straight, slender, compressed, tapering rather abruptly; 
with obtuse, slightly waved, oblique, somewhat irregular 
annulations, which sometimes become obsolete on the back 
margin, while at others they reach only about half way. 
Found in the Clay at Folkstone, by Mr James Gibbs, and 
at Ringmer. 
12. H. rotundus —The Round Hamite, pi. II. fig. 7. 
Sowerby, Min. Conch. I. p. 136, pi. 61, figs. 2, 3. 
Shell round, slightly and gradually curved, with regular, 
somewhat obtuse numerous annulations ; aperture round. 
Found in the Folkstone clay, and at Ringmer. 
13. H. attenuatus. —The Attenuated Hamite, pi. I. fig. 5, 
and pi. II. fig. 15. 
Sowerby, Min. Conch. I. p. 137, pi. 61, figs. 4, 5 ; Buck- 
land’s Geology and Mineralogy Considered, II. p. 65, pi. 44, 
fig. 11. Mantell, Geology of Sussex, p. 93, pi. 19, figs. 29 , 30. 
Cylindrically compressed; larger limb abruptly attenuated 
immediately under the curve, from whence it is round; with 
numerous obtuse annulations, which become obsolete towards 
the back. 
Found in the clay at Folkstone, Laughton, Ringmer, Nor- 
lington, and in the counties of Kent and Surrey. 
14. H. compressus. —Compressed Hamite, pi. III. fig. 7. 
Sowerby, Min. Conch. I. p. 136, pi. 61, figs. 7, 8. 
Compressed, with oblique, sharp, regular, slightly undulated 
annulations, thickest and most prominent behind, and bending 
towards the curve ; thicker end oval ; the breadth two-thirds 
its length. 
Found in the clay at Folkstone, and at Ringmer. 
15. II. maximus. —The Great Hamite, pi. I. fig. 14. 
Mantell, Geology of Sussex, p. 93. Sowerby, Min. Conch. 
I. p. 138, pi. 62, fig. 1. Parkinson’s Organic Remains, III. 
pi. 10, fig. 4. 
Slightly compressed, with somewhat oblique annulations, 
becoming nearly obsolete behind; larger end semi-ovate, 
smaller end nearly round. 
Found in the Clay at Folkstone, and fragments of it have 
been gathered at Ringmer and Norlington. 
16. H. intermedius —The Intermediate Hamite, pi. III. 
fig. 2. 
Sowerby, Min. Conch. I. p. 139, pi. 62, fig. 4. Mantell, 
Geology of Sussex, p. 93, pi. 23, fig. 12. Do. in Geology 
South East of England, p. 160, fig. 3. 
Compressed, with continuous, oblique, protruding annula¬ 
tions, somewhat flattened, and thickest on the outer surface, 
and descending from the internal side. 
