228 aASTEBOPODA . 



Rissoa (Hi/drobia) Chastelii? 

 Forbes's 'Isle of Wight,' Mem. Geol. Surv. 18o(J, pi. iv. tig. 3, pp. 148, 152. 



Etichilus Chaistelii. 



Land- u. Siissw.-Concli. 1873, pi. xx. fig. 11, p. -Slo. 



Bithinia Duchastvll. 

 Desc. Aniiii. sans Vert. 1862, vol. ii. pi. xxxiii. tigs. o-S, p. 4'J-). 



Horizon and Locality. 



Oligocene. — Hempstead Beds. Hempstead. - 



Tomichia microstoma, Deshayes, 1824. 



Cyclostoma microstoma. • 

 Coq. Foss. Paris, 1824, vol. ii. pi. vii. figs. 13, 14, p. 78. 



Bithinia microstoma. 



Desc. Anim. sans Vert. 1802, vol. ii. pi. xxxv. figs. 21-24, p. 495. 



Horizon and Locality. 

 Upper Eocene. — Barton Beds. High Cliff. 



Tomichia polita, Edwards, 1852. 



Btdimus politus. 

 Mon. Pal. Soc. 1852, pi. xi. figs. I'-l", p. 73. 



Nystia polita. 

 Land- u. Siissw.-Oonch. 1873, p. 266. 

 Ann. See. K. Mai. Belgique, 1888, vol. xxiii. pi. viii. figs. 35-37, p. 228. 



Horizon and Localities. 

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



Tomichia teres, Edwards (MS.). 



Horizon and Localities. 



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



Tomichia tuba, Deshayes, 1862. 



Bithinia marceau.viana. 

 Bithinia tuba. 



Desc. Anim. sans Vert. 1862, vol. ii. pi. xxxiv. figs. 19-21, 25-28, p. 503. 



Polycirsus tuba. 

 Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. p. 216. 



Horizons and Localities. 



Upper Eocene. — Barton Beds. High Cliff. 



Middle Eocene. — BracMesham Beds. Bracklesham Bay. 



Genus PYRGULA, J. de Cristofori and G. Jan, 1832. 

 Cat. rerum Isatiu'alium, 1832, sect. 2, part 1, suppl. p. 4. 



Sellia, De Raincourt, 1884. 



Bull. 8oc. G(5ol. France, 1884, ser. 3, vol. xii. pi. xii. fig. 8, p. 344. 



Non Sellio, Mulsant, 1860. 



Pyrgula ditropis, Edwards (MS.). 



Horizon and Locality. 



Oligocene. — Headon Beds. Hordwell. 



