96 SUPPLEMENT TO THE CRAG MOLLUSCA. 



of Norwich Crag shells, as from Thorpe, " a single valve," and is marked unique. This 

 specimen cannot now be found, and as no confirmation of it appears in any of the 

 collections known to me, it is impossible to say what species was intended. 



Scaphander librarius ? Loven. Supplement, Tab. V, fig. 18 a, b. 



Scaphander librarius, Loven. Iud. Moll. Scandin., p. 10, 1846. 



— Jeffreijs. Brit. Moll., vol. v, pi. 102, fig. 9, 1SG9. 



Locality. Coralline Crag, Sutton. 



My cabinet contains two or three specimens of the above genus, which appear to 

 differ from lignarius, Linn., in being much less expanded at the lower part, and I have 

 referred them, but with doubt, to the new species of Dr. Loven. My specimens are not 

 quite perfect. 



Bullosa ventrosa, S. Wood. Crag Moll., vol. i, p. 182, Tab. XXI, fig. 11. 



This is still a rare shell, and found only in the Cor. Crag of Sutton, so far as I know. 

 In ' Brit. Conch., vol. iv, p. 425, Mr. Jeffreys has described a new species of Bullcsa, 

 under the name of Urtriculus (Bullaa) ventrosus. This does not appear to be the same 

 as the Crag ventrosa, and his use of the name ventrosus may give rise to confusion. I 

 propose that his shell be called ventricidosus. 



Amjjhisphyra globosa, Loven, is closely allied to Bullaa ventrosa, but it is described 

 in 'Brit. Conch.' {Urtricidus globosus, vol. v, p. 223, PI. CII, fig. 8) as having "slight, 

 indistinct, and irregular spiral lines, which are only discernible with the aid of a 

 magnifying power, and in certain lights." If this be an essential character, globosa must 

 also differ from the Crag ventrosa, as the latter has very distinct and regular spiral striae, 

 otherwise I should have been disposed to regard the two species as identical. 



In the address of the President of the Geological Society for 1871, at page liv, is a 

 " List of Mollusca known hitherto as fossil only, and now discovered to be living in the 

 depths of the Atlantic." In this list is the name of Cyliclina ovata as a Coralline Crag 

 fossil. I do not know this shell, nor can I ascertain to what the name refers. 



Ringicula buccinea, Broc. Crag Moll., vol. i, p. 22, Tab. IV, fig. 2. 



Localities. Cor. Crag, Sutton, and near Orford. Red Crag, Sutton. 



In a paper by the Rev. 0. Fisher in the twenty-second volume of the ' Quarterly 

 Journal of the Geological Society,' p. 26, B. buccinea is given among a list of shells 

 obtained by him from the Fluvio-marine deposit of Yarn Hill, near Potter's Bridge, 

 Southwold. The specimen fortunately was preserved, and on re-examination it turns out 



