270 SA.SIEROPODA. 



Helix Morrisi. 

 Mon. Pal. Soc. 1877, pi', xxsiv. figs. 5% o"", p. 331 (type missing). 



Helix ly TJrhani. 

 Helix Keepinf/i (MS.). 

 Helix omphaloides (MS.). 

 Geol. Mag. 1885, p. 249. 



Horizon and Localities. 

 Oligocene. — Bembridge Beds. Sconce ; Ileadon Hill. 



Helix Etheridgei, Edwards (MS.). 



Horizon and Localities. 



Oligocene.— Bern/fridge Beds. HeadonHill; Sconce. 



Helix Headonensis, Edwards, 1852. 



Helix Headonensis. 



Mon. Pal. Soc. 1852, pi. xi. figs. o'-S"", p. 70. (F. E. Edwards Coll.) 



Gastrodonta Headonensis. 

 Land- u. Sussw.-Conoh. 1873, pi. xiv. fig. 24, p. 276. 



Helix Headonensis. 



Geol. Mag. 1886, p. 250. 



Horizon and Locality. 

 Oligocene. — Bembridge Beds. Headon Hill. 



Helix leia, Edwards (MS.). 



Horizon and Locality. 

 Oligocene. — Headon Beds. Headon Hill. 



Helix occlusa, Edwards, 1852. 



Heliv occlusa. 

 Mon. Pal. Soc. 1852, pi. x. figs. lO'-lO", p. (54. (F. E. Edwards Coll.) 

 Land- u. Siissw.-Concli. 1872, pi. xiii. lig. 15, pi. xv. fig. 27, p. 228. 

 Geol. Mag. 1886, p. 249. 



Ariophanta occlusa. 



Ann. Soc. R. Mai. Belgique, 1889, vol. xxiv. pi. xi. figs. 42-44, p. 352. 



Horizon and Localities. 



Oligocene. — Bembridge Beds. Sconce ; Headon Hill. 



Helix omphalus, Edwards, 1852. 



Helix omphalus. 

 Mon. Pal. Soc. 1852, pi. x. iigs. 6»-6», p. G5. (F. E. Edwards Coll.) 



Patula omphalus. 

 Land- u. Siiasw.-Concli. 1873, p. 289. 



Helix omplialus. 

 Geol Mag. 1885, p. 249. 



Horizons and Localities. 

 Oligocene. — Bembridge Beds. Bembridge; Sconce; HeadonHill. — Headon 

 Beds. Hordwell. 



