194 GASTEKOPOKA, 



Potamides duplex, J. ISowerby, 1822. 



Potamides duplex. 



Mineral Conchology, 1822, pi. 340. fig. 3. (Sowerby Coll.) 



Horizon and Localities. 

 Oligooene. — Headon Beds. Headon Hill ; Colwell Bay. 



Potamides elegans, Deshayes, 1833. 



Cerithium elegam. 

 Coq. Foss. Paris, 1833, vol. ii. pi. li. figs. 10-12, p. 337. 



Horizon and Locality. 

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Potamides emarginatum, Lamarck, 1804. 



Cerithium emarginatum. 

 Ann. Mus. 1804, vol. 3. p. 439. 



Coq. Foss. Paris, 1833, vol. ii. pi. xlv. figs. 12, 13, p. 332. 

 Dixon's ' Sussex,' 1850, p. 182. 



Horizon and Locality. 

 Middle Eocene. — Bracklesham Beds. Brook. 



Potamides funatus, J. Sowerby, 1816. 



Cerithium funatum. 

 Mineral Conchology, 1816, pi. 128. (Sowerby Coll.) 



Cerithium funiculatum. 

 Cerithium intermedium. 

 Mineral Conchology, 1816, pi. 147. figs. 1-4. (Sowerby Coll.) 



Cerithium funatum. 

 Foss. South Downs, 1822, pi. xvii. fig. 4, p. 268. 



f^p i'l'fJuiii'ni "iyftfiQuitG 

 Coq. Foss. Paris, 1833, vol. ii. pi. Ix. figs. 19, 20, pi. Ixi. figs. 21, 22, 25-29, 

 p. 403. 



Tympanotomus funatvs. 

 Ann. Soc. R. Mai. Bel^que, 1889, vol. xxiv. p. 70. 



Horizon and Localities. 



Lower Eocene. — Woolwich Beds. Dulwicb; Charlton; Upnor; Wool- 

 wich ; Newhaven ; Bickley ; Beekeuham ; Plumstead ; Chiselhiu-st ; 

 Ehnstead Tunnel. 



Potamides fauatus, var. 1. 



Horizon and Localities. 



Oligocene. — Headon Beds. Colwell Bay ; Headon Hill ; Brockenhurst ; 

 Mead End ; Hordwell. 



Potamides funatus, var. 2. 



Horizon and Locality. 



Oligocene. — Hempstead Beds. Hempstead. 



Potamides gradatus, Deshayes, 1833, var. 



Cerithittm gradalum. 

 Coq. Foss. Paris, 1833, vol. ii. pi. xliii. figs. 9, 10, p. 330. 



Horizon and Locality. 

 Middle Eocene. — Bracklesham Beds. Stubbington. 



