GASTHROPODA. 5 
This somewhat resembles O. Adriatica, Sow., but I believe it is only a short variety of 
O. spelta, which I will here call var. drevior. Specimens from the Cor. Crag in Mr. Cavell’s 
collection exhibit also the same differences. Mr. Bell gives the name of O. Adriatica (‘ Ann. 
and Mag. Nat. Hist.,’ May, 1871, p. 9) as a Crag species, which I imagine to be the short 
variety. This thickened margin, the presumed indication of the adult, may be seen on 
specimens of various sizes, like the variations in Cyprea Europea. I have obtained the 
shell from Butley, where it is smaller than m the Walton bed. I am informed by Mr. 
Charlesworth that the specimen, upon the authority of which this species was introduced 
by Dr. Woodward into his Norwich Crag list, is most probably spurious as a Norwich 
Crag shell. 
Ovulum obtusum from China, Sow., ‘'Thesaur. Conch.,’ vol. ii, p. 474, pl. ¢, figs. 22, 23, 
can scarcely be distinguished from our Crag shells. 
Cyprma Eurorma, Mont. Crag Moll., vol. 1, p. 17, Tab. II, fig. 6, and Supplement, 
Tab. V, fig. 24. 
Localities. Cor. Crag, Sutton, and near Orford. Red Crag passim. Middle Glacial, 
Billockby. 
The figure in Supplement, Tab. V, represents a very globose form from the Red 
Crag of Sutton, which I believe is merely a variety of C. Luropea, although it is more 
spherical and less elongated than the generality of specimens, and it has rather more 
numerous ridges. In Mr. Bell’s paper on “Some new or little-known Shells of the Crag” 
(Ann. and Mag. Nat. Hist.,” September, 1870) is the name of Cyprea Dertonensis, 
Mich., but I do not know the shell he alludes to. If it be the present Crag shell I 
cannot acquiesce in the reference. The shell figured and described by Michelotti (‘ Desc. 
des Foss. Terr. Mioc. de I'Ital.,’ p. 331, pl. xiv, fig. 10) appears to me to be a different 
species. I have not seen Mr. Bell’s specimen. 
Fragments of C. Huropea have occurred in the Middle Glacial sand of Hopton Cliff. 
T am informed by Mr. Charlesworth that the specimen upon the authority of which Cyprea 
Luropea was introduced into Dr. Woodward’s Norwich Crag list is probably spurious 
as a Norwich Crag shell. 
RosTeLLaria Lucipa ? J. Sowerby. Supplement, Tab. II, fig. 14. 
Locality. Red Crag, Sutton. 
In my ‘Catalogue,’ as also in the ‘Crag Mollusca,’ vol. i, p. 24, mention is made of 
a shell found in the Red Crag at Sutton, to which I gave the name of R. plurimacosta, 
and then stated it as greatly resembling the London Clay species (R. lucida). The 
