GASTEROPODA. 61 
a specimen from the same formation (at Sutton) of Oh. fulvocincta, Forb. and Hanl., which 
Mr. Jeffreys considers only as a variety of rufa ; the difference between these two consisting 
in one having rather more convex volutions than the other. The figure in ‘Crag Moll.’ 
has the costa rather too numerous, and they are not sufficiently erect. 
Curmnitzia RuGULOSA, S. Wood. Supplement, Tab. IV, fig. 15. 
Locality. Red Crag, Walton Naze. Fluvio-marine Crag, Yarn Hill ? 
‘Two somewhat imperfect specimens, presumedly belonging to this genus, were found 
by myself many years since, one of which is represented in the above figure. ‘They were 
not described in the ‘Crag Mollusca,’ in the hope that something more perfect or capable 
of better determination might be discovered, but in this I have been disappointed. 'These 
are unfortunately much rubbed and their true markings partially obliterated. The volu- 
. tions are convex on the lower part and flattened above, where there are some obsolete riblets, 
and there is an indistinct fold upon an upright columella—the characteristic distinction of 
this genus. The shell it most resembles is Oh. speciosa, dredged by Mr. McAndrew in Vigo 
Bay, but I am not able to say they are the same. Mr. Crowfoot has recently sent me 
two still more imperfect specimens from the Fluvio-marine deposit at Yarn Hill, which, [ 
think, may be referred to the same species. I have given the name provisionally. 
CHEMNITZIA PLICATULA? Brocchi. Supplement, Tab. VII, fig. 3. 
TurBo PLIcaTULUS, Broce. Conch. Foss. Sub-ap., vol. ii, p. 376, t. vii, fig. 5, 1814. 
TURBONILLA PLICATULA, Hérnes. Conch. Foss. Wien., vol. i, p. 503, tab. xliil, fig. 33, 
1856. ' 
Localities. Red Crag, Butley, Walton Naze (Bel/). Chillesford Bed, Beccles 
Waterworks. 
A single, but very imperfect specimen (the one figured from Butley) has been put 
into my hands by Mr. A. Bell, to which the name above was attached. It is too imperfect 
for diagnosis, and I have referred it as above, though with doubt. The fragment shows 
about three fifths of what probably was its original size. The plications and ribs are 
straight and numerous, and the volutions are nearly flat. It differs from the one I have 
previously called rugulosa, in which the volutions are convex on the lower part. 
Mr. Crowfoot has recently sent to me two small fragments, which appear to belong to 
the same species. These, he tells me, were obtained in sinking the Beccles Waterworks 
well, which, it is to be presumed, pierced the same bed as that not far away at Aldeby, 
though it has a Fluvio-marine aspect. All these fragments have had their surface more 
or less decorticated or altered in some degree, and the above reference is not satisfactory. 
