PEOSOBBANCHIATA. NEEITIDiE. 251 



Genus NACELLA, Schumacher, 1817. 

 Nouv. Syst. Hah. Test. 1817, p. 179. 



Nacella lineatissixna, Edwards (MS.). 

 Horizon and Locality. 



Upper Eocene. — Barton Beds. Barton. 



Family NERITID^, J. E. Gray. 



Genus NERITA, Linnaeus, 1767. 

 Systema Naturas, 17C7, ed. 12, vol. i. part 2, p. 1251. 



Nerita globosa, J. de C. Sowerby, 1823, var. 



Nerita globosa. 

 Mineral Conchology, 1823, pi. 424. fig. 1 (type missing). 



Horizon and Locality. 

 Lower Eocene. — London Clay. Near Chalk Farm (Wetherell Coll.). 



Nerita Parisiensis, Deshayes, 1804. 



Keritopsis Parisiensis.  



Desc. Anim. sans Vert. 1864, vol. iii. pi. Ixvi. figs. 1-3, p. 8. 

 Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. p. 81. 



Horizon and Localities. 



Middle Eocene. — Bracklesham Beds. Brook ; Bracklesham Bay ; Stub- 

 bington. 



Nerita pentastoma, Deshayes, 1864. 



Nerita pentastoma. 



Desc. Anim. sans Vert. 1864, vol. iii. pi. Ixvi. figs. 7-9, p. 17. 

 Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. p. 83. 



Horizon and Locality. • 



Middle Eocene. — Bracklesham Beds. Brook. 



Nerita tricarinata, Lamarck, 1804 and 1806. 



Nerita tricarinata. 



Ann. Mu3. 1804, vol. 5. p. 94; 1806, vol. 8. pi. xiv. fig. 4. 



Coq. Foss. Paris, 1825, vol. ii. pi. xix. figs. 9, 10, p. 160. 



Mon. Pal. Soc. 1877, pi. xxxiv. figs. 22", 22", p. 349. (F. E. Edwards Coll.) 



Ann. Soc. R. Mai. Belgique, 1888, vol. xxiii. p. 83. 

 Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Genus NERITINA, Lamarck, 1822. 

 Hist. Nat. Anim. sans Vert. 1822, vol. vi. part 2, p. 182. 



Neritina aperta, J. de C. Sowerby^ 1823. 



Nerita aperta. 



Mineral Conchology, 1823, pi. 424. figs. 2-4. 

 Neritina (Mitrula) aperta. 



Land- u. Sussw.-Conch. 1873, pi. xv. fig. 15, p. 269. 



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