APPENDIX. 



307 



(a) A fragment of what appears to be this species is in my cabinet, and tlie name is also in Mr. Trimmer's Paper on the 

 Orton Gravel. — Quart. Joiini. Geol. Soc, vol. x, p. 346. 



(i) A fragment, on the authority of Mr. Pickering. 



(c) In Mr. Brown's List. 



{d) Professor Morris, in his ' Catalogue,' gives this from Clacton. May not the burrowing habits of the living animal have 

 introduced it amongst the fossils ? I have frequently found dead specimens wlieu examining the Cor. Crag sand. 



(e) I have been unable to obtain any satisfactory evidence of the fossil state of this species. An imperfect Clausilia much 

 resembles it, and may possibly have been mistaken as such. 



(/) From the Valley of the Nar. (C. B. Rose.) 



(ff) My cabinet contains only a fragment, from Clacton, of what may be this species. 



(A) This is given with a ?,in Mr. Prestwich's Paper. Quart. Joiirn. Geol. Soc, vol. xi, p. 110, toe. Shacklewell Lane. It is 

 mentioned also in Mr. Trimmer's Paper on the Orton Gravel, loc. cit. ante. 



(i) From Sir Charles Lyell's Paper on the Mundesley Fresh-water Beds. — Phil. Mar/., vol. xvi, p. 365. 



(k) The fragment of a Pln/sa, from Clacton, is in my cabinet, but not perfect enough to determine the species. 



{I) PI. hevis is mentioned in Sir Charles Lyell's Paper from Mundesley. I presume it is this species. 



