282 GASTEROPODA. 



Planorbis euomphalus, J. ^owerbj', 1816. 



Planorhis euomj^halvs. 



Mineral Concholofrv, 1816, pi. 140. fig. 7. (Sowerby Coll.) 



Men. Tal. See. 1852, pi. xv. figs. O^-e-^, p. 09. (F. E. Edwards Coll.) 



Helisoma euomphalus. 



Ann. Soc. II. Mai. Belgique, 1889, vol. xxiv. pi. xi. figs. 41, 42, p. 334. 

 Horizons and Localities. 



Oligocene. — Ileadon Beds. Headon Hill; Hordwell ; Brockenhurst. — Barton 

 Beds. High Cliff. 



Planorbis goniobasis, Sandberger, 1873. 



Planorhe arrondi. 



Ann. Mus. 1809, vol. 14. pi. 27. figs. 19, 20, p. 433. 



Planorbis rotundattis. 



Ann. Mus. 1810, vol. 1-5. pi. 22. figs. 4, 5, p. 370, non Poiret, 1801. 



Planorbis cylindricus. 



Mineral Conchology, 1810, pi. 140. fig. 2. 

 Mon. Pal. Soc. 1852, p. 109. 



Planorbis rotundatus. 

 Mon. Pal. Soc. 1852, pi. xv. tigs. 4»-4'', p. 100. (F. E. Edwards Coll.) 

 Desc. Anini. sans Vert. 1863, vol. ii. pi. xlvii. figs. 1-5, p. 739. 



Menetus goniobasis. 



Land- u. Siissw.-Conch. 1873, pi. xv. fig. 21, p. 272. 

 Ann. Soc. R. ]\fal. Belgique, 1889, vol. xxiv. p. 3."!2. 

 Horizons and Localities. 



Oligocene. — Bembridye Beds. Sconce; Binstead; Bembridge. — Headon 

 Beds. Headon Hill ; near Yarmouth, Isle of Wight ; Hordwell ; Brocken- 

 hurst. 



Planorbis hemistoma, J. Sowerby, 1816. 



Planorbis hemistoma. 



Mineral Conchology, 1816, pi. 140. fig. 0. (Sowerby Coll.) 



Mon. Pal. Soc. 1852, pi. xv. figs. ll"-ll<i, p. 106. (F. E. Edwards Coll.) 



Land- u. Siissw.-Goncli. 1872, pi. ix. fig. 10, p. 189. 



Anisus hemistoma. 



Ann. Soc. K. Mai. Belgique, 1889, vol. xxiv. p. 336. 

 Horizons and Localities. 



Oligocene. — Headon Beds. HordweU ; Mead End. 



Lower Eocene. — Vnohn'rh Bedn. Phinistend ; Upnor ; Sundridge ; iJother- 

 hithe. 



Planorbis incertus, Eawards (MS.). 



Horizon and LMcality. \ 



Lower Eocene. — WoohoicA Beds. Peckham. 



Planorbis lens, Brongniarl, 1810. 



Planorbis lens. * 



Ann. Mus. 1810, vol. 15J: pi. 22. fig. 8, p. .372. 



Mineral Conchology, 18ft), pi. 140. fig. 4. (Sowerby Coll.) 



Mon. Pal. Soc. 1852, pi. ^. figs. 8-'-8'', p. 104. (F. E. Edwards Coll.) 



Land- u. Siissw.-Conch. 1^73, pi. xv. fig. 25, p. 274. 

 Horizons and Localities. 



Oligocene. — Bembridye Beds. Bembridge. — Headon Beds. Hordwell ; 

 Headon Hill. 



