fe AF GASTEROPODA. 3D 
the one previously figured. Dr. Hérnes represents the lip as deeply sinuated above the 
keel. 
PiuvRoroMA cRIsPATA, Jan. Supplement, Tab. VI, fig. 13. 
PLEUROTOMA CRISPATA, Jan. Catal., p. 9, No. 25, fide Bellardi. 
= — Bellardi. Mon. Pleur. Foss. Pied., p. 69, Tab. IV, fig. 2, var. 
A. papillosa. 
= == Hérnes. Foss, Moll., Vien., vol. i, p. 367, t. xxxix, fig. 13. 
Locality. Cor. Crag, Ramsholt. 
Spec. Char. Pl. “ Testa turrita, spira elata, anfractibus convexis medio carinatis, 
postice concavis, longitudinaliter arcuatim striatis, antice convewxis, transversim grosse 
striatis subcostatis ; stris equidistantibus in primis \ vel 2 in ultimo perplurimis usque ad 
canalem regulariter decressentibus, carina simplici ; sutures marginatis, margint simplict, 
filiform ; canali brevi, contorto, apertura, ovata.’—Bellardi. 
This shell was found by myself some years ago in the Coralline Crag, at Ramsholt, 
and as it has a sub-nodulous keel upon the upper whorls, it was (with other forms which 
I have now separated) regarded as a variety of the shell figured under the name of P. 
semicolon in ‘Crag Moll.’ vol. i, p. 54. I now think it is specifically distinct, and have 
referred it to Bellardi’s var. carina nodulosa of P. crispata, Jan. The sinus, as shown 
by the lines of growth, is broad, and curving from the keel to the suture, below which is 
asmall ridge. ‘The apex of my shell is obtuse and smooth, and the aperture is rather 
shorter comparatively than the species to which it is referred. 
Prevroroma Icunorum, S. Wood. Crag Moll., vol. i, p. 54, Tab. VI, fig. 3 @ (as Pi. 
semicolon). 
Locality. Coralline Crag, Orford and Sutton. 
In the ‘Crag Moll.’ this shell was doubtfully referred as var. a@ of Pl. semicolon, a 
Lower Tertiary species. Since then I have seen and found more and better specimens, 
which satisfy me that the Crag shell is quite distinct from semzcolon ; a view shared by 
Mr. Edwards in his ‘ Hocene Mollusca Univalves’ (p. 244). I should have been inclined, 
from Basterot’s figure of P/. denticula, to refer the Crag shell to his species of that name ; 
but another widely spread Hocene shell is described by Mr. Edwards under the name 
Pt. denticula (‘ Hocene Moll. Univalves,’ p. 236), and considered by him to be identical 
with Basterot’s species. As the Crag shell is clearly distinct from the shell thus 
identified by Mr. Edwards with -P/. denticula, Bast., there seems no alternative than to 
assign it another name as a new species, which I have accordingly done as Pl. [cenorumz. 
It appears to be intermediate between denticula and galerita. 
