PROSOBRANCHIATA. — PALTTDESTRINir.E. 229 



Pyrgnla pulchra, De Raincourt, 1884. 



SelUa pulchra. 

 Bull. Soc. GiSol. France, 1884, stSr. .3, vol. xii. pi. xii. fig. 8, p. .344. 

 Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. pi. viii. figs. 25, 26, p. 217. 



Horizons and Localities. 



Oljgocene. — Headon Beds. Mead End. 



Upper Eocene. — Barton Beds. Barton ; High Cliff. 



Pyrgula pulchra, var. denticulata, Edwards (MS.). 



Horizon and Localities. 

 Oligocene. — Headon Beds. Colwell Bay : Hordwell. 



Genus BITHINELLA, Moquin-Tandon, 1851. 



Joum. Conchyl. 18-51, p. 239, footnote. 

 Hist. Nat. Moll. France, 1855, vol. 2. pi. xxxix. figs. 11-17, p. 534. 



Bithinella pulchra, Deshayes, 1862, var. 



Bithinia pulchra. 

 Desc. Anira. sans Vert. 1802, vol. ii. pi. xxxiv. figs. 20-31, 



Bithinella pulchra. 

 Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. p. 218. 



Horizons and Localities. 

 Oligocene. — Hempstead Beds. Hempstead. — Headon Beds. East Cowes. 



Bithinella Websteri, Morris, 1854. 



Hydrobia Websteri. 

 Quart. Joum. Geol. Soc. 1854, vol. x. pi. ii. fig. 22, p. 160. 



Bithinia Websteri. 

 Desc. Anim. sans Vert. 1802, vol. ii. pi. xxxiv. figs. 32-34, p. 500. 



Horizon and Locality. 

 Lower Eocene. — Woolwich Beds. Upnor. 



Bithinella, sp. 



Horizon and Locality. 



Upper Eocene. — Barton Beds. High fliff. 



Genus STENOTHYRA, W. H. Benson, 1856. 

 Annals, 18-56, vol. xvii. ser, 2, p. 342. 



Nematura, \V. H. Benson, 18-36. 

 Joum. Asiatic Soc. Bengal, 18-30, vol. v. p. 781, non Fischer, 1813. 



Stenothyra lubricella, A. Braun, 1851. 

 Litorinelln lubricella. 



Walchner's Handb. fieognosie, 1«51, od, 2, p. 11 20 {Jidi' Sandberger). 



