29 
HAMITES spinulosus. 
TAB. CCXVI.---Fig. 1. 
Dentalium ? spinulosum. Miller’s MSS. Catal. 
Spec. Cuar. Depressed, undulations regular, every 
other one armed with two sharp spines ; open- 
ing elliptical ; curvature very gradual. 
"Te undulations upon the sides of this elegant Hamite 
are all equally prominent, and almost disappear upon 
the narrow back. The spines are situated along each 
side near the front ; they diverge a little. ‘The curve, as 
exhibited by a small part only of an entire shell, is nearly 
as wide as the segment of a circle. 
A delicate specimen of this shell was in the valuable 
envoy from Mr. Miller, out of which I have already 
figured several rarities : it is a cast in transparent Cal- 
cedony, with an opaque pulverulent crust. Although it 
be transparent, and evidently hollow, it does not shew 
any signs of Septa, but it may only be a cast of the out- 
side, or as Mr. Miller observes, the chamber beyond the 
last septum. The deficiency has, however, induced Mr. 
Miller to call it a Dentalium for the present. It was 
found on Blackdown. 
HAMITES spiniger. 
TAB. CCXVI.---Fig. 2. 
Sprc. Cuar. Depressed ; undulations many, slen- 
der: two rows of sharp tubercles upon each 
side, those nearest the front largest ; curvature 
oradual. 
Nomerovs, slightly elevated, irregular rings charac- 
terize this species: the anterior tubercles collect, into 
each of their bases, several of the undulations, which 
sometimes run a little way up them. The mouth ts oval. 
Found in marle, in the neighbourhood of Folkstone, 
by Mr. Gibbs. The pearly crust is nearly obliterated. 
