PROSOBEANCHIATA. CEKITHIIDa;. 193 



Potamides Ansteni, Morris, 1856. 



Cerithium Axtsteni. 

 Forbes's <Me of Wight,' Mem. (Jeol. Surv. 1856, pi. iii. fig. 11, p. 150. 



Horizon and Locality, 



Oligocene. — Bembridge Beds. Hempstead. 



Potamides cinctus, Bruguicre, 1792. 



Cerithium cinctum. 

 Encycl. Meth. 1792, vol. 1. p. 493. 

 Coq. Foss. Paris, 1833, vol, ii. pi. xlix. figs. 12-14, p. 388. 



Horizon and Locality. 

 Oligocene. — Hempstead Beds. Hempstead. 



Potamides conarins, Bayan, 1873. 



Cerithium. trochiforme. 

 Coq. Foss. Paris, 1833, vol. ii. pi. Iii. figs. 1-3, p. 336, nan Lamarck. 



Cerithium conarium. 

 Etudes Foss. Nouveaux, 1873, fasc. 2. p. 108. 



Horizons and Localities. 



Upper Eocene. — Barton Beds. High Cliff. 



MidAle Eocene.^ Bracklesham Beds. Bramshaw; Huntingbridge ; Brook. 



Potamides conjunctus, Dcsbayes, 1883. 



Cerithium coniimctum. 

 Coq. Foss. Paris, \Sm, vol. ii. pi. Ixxiii. figs. 1-3, p. 387. 

 Desc. Anim. sans Vert. 1864, vol. iii. pi. Ixxx. figs. 9-13, 16, p. 123. 



Cerithium trilinum. 

 Wise's ' New Forest,' 1863, pp. 244 (woodcut), 247. (J. R. Wise CoU.) 



Horizon and Localities. 

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay; Bramshaw; Brook. 



Potamides conoideus, Lamarck, 1804. 



Cerithium cmioideutn. 

 Ann. Mus. 1804, vol. 3. p. 345. 

 Coq. Foss. Paris, 1833, vol. ii. pi. xlv. figs. 14, 15, p. 333. 



Horizon and Localities. 

 Middle Eocene. — Bracklesham Beds. Stubbington ; Bracklesham Bay. 



Potamides crassus, Edwards (M8.). 



Horizon and Localities. 

 Lower Eocene. — Woolwich Beds. Bickley ; Chiselhurst. 



Potamides Dixoni, Doshayes, 1864. 



Cerithium marginatum, 

 Dixon's ' Sussex,' 18-50, pi. vi. figs. 4, 6, p. 182, non BruguiSre. (Dixon 

 Coll.) 



Cerithium Hivoni. 



Desc. Anim. sans Vert. 1864, vol. iii. p. 136. 

 Horizon and Localities. 



Middle Eocene. — Bracklesham Beds. Bracklesham Bay ; Stubbington ; 

 Brook ; Bramshaw. 







