GASTEROPODA. 63 



Odostomia conoidea, Brocchi. Crag Moll, vol. i, p. 85, Tab. IX, fig. 3 a (as 



0. plicata) . 



Odostomia conoidea, Broc. Conch. Foss. Sub-ap., p. 660, c. 16, fig. 2. 



Localities. Cor. Crag, Sutton, Ramsholt, and near Orford. Red Crag, Walton ? 

 Fluvio-marine Crag, Bramerton ? Middle Glacial, Billockby ? 



This shell was in the ' Crag Moll.' referred by me to 0. plicata of Mont, with 0. 

 conoidea, Broc., as a synonym. The two, however, appear to be, as stated p. 317 of 

 Appendix, distinct. 0. conoidea is given by Mr. Bell from Walton in ' Ann. and Mag. 

 Nat. Hist.,' September, 1870, but I have not seen the specimen. This is the only Red 

 Crag occurrence of it of which I am aware. An imperfect specimen obtained by Mr. 

 Reeve from the Fluvio-marine Crag of Bramerton, and another by my son from the 

 Middle Glacial sand of Billockby, appear to belong to this species, but they are not 

 sufficiently perfect for certain identification. 



Odostomia plicata, Mont. Supplement, Tab. IV, fig. 22. 



Turbo plicatus, Mont. Test. Brit., p. 325, tab. xxi, fig. 2. 



Localities. Cor. Crag, Sutton. Red Crag. 



A single specimen of this shell, which has been obtained by me from the Coralline 

 Crag at Sutton, and is represented in the above figure, enables me to retain the name of 

 Montagu's species as a Cor. Crag shell, as mentioned p. 317 (Od. plicata) of Appendix. 

 I had it from the Red Crag, but the name of the locality has not been preserved. 



Odostomia conspicua ? Alder. Crag. Moll., vol. i, p. 85, Tab. IX, fig. 3 (as 



0. plicata, var.) . 



Odostomia conspicua, Alder. Trans. Tynes Nat. Field Club, i, 359. 



Locality. Cor. Crag, Sutton. 



The shell figured in 'Crag Moll.' as variety b of 0. plicata, Mont, seems to me now 

 more to resemble the above shell conspicua ; that species and conoidea being the only two 

 recent British species which, like our Crag shells, are denticulated on the inner side of the 

 outer lip. I have assigned it to conspicua with doubt, as it may not improbably be some 

 foreign species unknown to me. 



