GASTEROPODA. 5 



This somewhat resembles 0. Adriatica, Sow., but I believe it is only a short variety of 

 0. spelta, which I will here call var. brevlor. Specimens from the Cor. Crag in Mr. Cavell's 

 collection exhibit also the same differences. Mr. Bell gives the name of 0. 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 Cypraa Earopcea. I have obtained the 

 shell from Butley, where it is smaller than in 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, pi. c, figs. 22, 23, 

 can scarcely be distinguished from our Crag shells. 



Cypr^a Europ^ea, Mont. Crag Moll., vol. i, 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. Earopcea, 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 Cyprcea 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 Eoss. Terr. Mioc. de l'ltal.,' p. 331, pi. xiv, fig. 10) appears to me to be a different 

 species. I have not seen Mr. BelPs specimen. 



Fragments of C. Europcea have occurred in the Middle Glacial sand of Hopton Cliff. 

 I am informed by Mr. Charlesworth that the specimen upon the authority of which Cyprcea 

 Europcea was introduced into Dr. Woodward's Norwich Crag list is probably spurious 

 as a Norwich Crag shell. 



Rostellaria lucida ? /. 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 B. plurimacosta, 

 and then stated it as greatly resembling the London Clay species (R. lucida). The 



