PE080BEANCHIATA .■ — ADEOEBIID*. 235 



Genus DIASTOMA, Deshayes, 1861. 

 Y)esc. Anim. sans Vert. 1801, vol. ii. p. 411. 



Diastema costellata) Lamarck, 1804 and 1806. 



Melanin costellatn. 

 Ann. Mus. 1804, vol. 4. p. 430; 1800, vol, 8. pi. xii. %. 2. 

 Ooq. Foss. Paris, 1825, vol. ii. pi. xii. figs. 5-0, p. 113. 



Diastoma costellata. 



Desc. Anim. sans Vert. 1861, vol. ii. p. 413. 



Horizons and Localities. 



Upper Eocene. — Barton Beds. Barton. 



Middle Eocene. — Bracklesham Beds. Bracklesham Bay; Brook : Bram- 

 shaw. 



Family ADEORBIIDiE, P. Fischer. 



Genus ADEORBIS, S. V. Wood, 1842. 

 Annals, 1842, vol. ix. p. 630. 



Adeorbis bicarinatus, Lamarck, 1804 and 1806. 



Planorbis bicarinata. 

 Ann. Mus. 1804, vol. 5. p. 36 ; 1806, vol. 8. pi. xiv. fig. 3. 



Turbo hicarinatus. 

 Coq. Foss. Paris, 1833, vol. ii. pi. xxxiii. figs. .I-S, p. 2o9. 



Adeorbis cmicaca. 



Desc. Anim. sans Vert. 1802, vol. 2. pi. xxix. figs. .30-3.1, p. 440. 



Adeorbis bicariwitus. 



Ann. Soc. K. Mai. Belgique, 1888, vol. xxiii. p. lo5. 



Horizon and Locality. 



Middle Eocene. — Brackksham Beds. Stubbington. 



Adeorbis concinnus, Edwards (M8.). 



Horizon and Locality. 



Upper Eocene. — Burton Beds, iligb ('lift'. 



Adeorbis delphinuloides, Edwards (M8.). 



Horizon and Jjocality. 



Middle Eocene. — Brackles/iam Beds. Wliitecliil Bay. 



Adeorbis ditropis, Edwards (MS.). 

 Horizon and iMcality. 

 Upper Eocene. — Barton Beds. Beacon Bunnev. 



Adeorbis lucidus (?), Cossmann, 1881. 



Adeorbis lucidus. 



.lourn. Conchyl. 1881, vol. xxix. pi. vii. fig. -3, p. 167. 



Ann. Soc. 11. "Mai. Belgique, 1888, vol. xxiii. pi. vi. figs. .'!0-32, p. l.';3. 

 Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Brodl;. 



