140 
HAMITES gibbosus. 
TAB. LXIL—Fig. 4, right hand figure. 
Spec. Cuar. Gibbous, undulations acute, pro- 
minent at the front, rather distant. 
Very flat at the back, where the undulations rise but little: 
the front is rounded, so that the end is an oval with the 
shortest diagonal from back to front, and just the reverse of 
all the others. 
Indurated marle is the substance upon which the pearly 
coat of this is preserved; the septa are so much blended as 
to be nearly obliterated. 
HAMITES adpressus. 
TAB. LXI.—fFig. 6. 
Spec. Cuan. Aperture round, lesser limb acute, 
pressed close to the larger; no undulations ; 
septa? distant, not waved. 
Ee 
Upon the surface, which is smooth and even, are circles 
that I suppose to be the edges of the septa, they are equally 
distant, notwithstanding the gradual diminution of the shell. 
I can scarcely admit this as an Hamite, since it appears 
to want one or two of the characters, but am unwilling to 
make a new Genus without seeing more specimens with 
similar characters. The only one I have seen is composed 
of ochraceous Iron. 
