142 GASTEROPODA. 



Mitra sulcifera, Edwards (MS.). 



Horizon and Locality. 



Middle Eocene. — Bracklesham Beds. Brook. 



Mitra volutiformis, Edwards, 1856. 



Mitra volutiformis. 

 Mon. Pal. Soo. 1856, pi. xxiv. figs. S'-S"^, p. 186. (F. E. Edwards Coll.) 



Horizon and Localities. 



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



Genus MARGirCTELLA, Lamarck, 1799. 

 M6m. Soc. Hist. Nat. Paris, 1790, p. 70. 



Marginella sestuarina, Edwards, 1865. 



Marginella pusilla. 

 Mon. Pal. Soc. 1854, pi. xviii. fig. 6, p. 143 {in parte). (F. E. Edwards Coll.) 



Marginella cesttmrina. 



Geol. Mag. 1865, pi. xiv. figs. 7"-7'=, p. 541. (F. E. Edwards Coll.) 



Horizon and Localities. 



Oligocene. — Headon Beds. Eoydon; Lyndhurst; Headon Hill. 



Marginella bifido-plicata (Charlesworth, MS.), Edwards, 1854. 



Marijinella hiJido-pUcata. 



Mon. Pal. Soc. 1854, pi. xviii. figs. 2^2R, p. 139. (F. E. Edwards Coll.) 

 Desc. Anim. sans Vert. 1865, yoI. ili. pi. civ. figs. 27-29, p. 552. 



Horizons and Localities. 



Upper Eocene. — Barton Beds. Barton ; High Cliff; Alum Bay (no. 29 



Bed). 

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 

 Lower Eocene. — London Clay. Alum Bay (no. 4 Bed). 



Marginella eburnea, Lamarck, 1803 and 1805. 



Marginella ehvrwa. 



Ann. Mus. 1803, vol. 2. p. CI ; 1805, vol. 6. pi. ii. figs. 9», O"-. 



Mon. Pal. Soc. 1854, pi. xviii. figs. I'-l', p. 137. (P. E. Edwards Coll.) 



Horizon and Locality. 

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 



Marginella gracilis, Edwards, 1854. 



Marginella gracilis. 



Mon. Pal. Soc. 1854, pi. xviii. figs. 4»-4', p. 140. (F. E. Edwards Coll.) 



Horizons and Localities. 



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

 Middle Eocene. — Bracklesham Beds. Bracklesham Bay. 

 Lower Eocene. — London Clay. Clai'eudon. 



