120 GASTEKOPODA. 



Pleurotoma comma, J. Sowerby, 1816. 



Pleurotoma comma. 



Mineral Concliology, 1816, pi. 146. fig. 5. 



Mon. Pal. Soc. 1860, pi. xxx. fig. 2, p. 281. 

 Horizon and Locality. 



Middle Eocene. — Brachksham Beds. Stubbington. 



This type is missing from the Sowerby Collection, and the species is unrepre- 

 sented In the other collections of the Museum. 



Pleurotoma conifera, Edwards, 1860. 



Pleurotoma conifera. 

 Mon. Pal. Soc. 1860, pi. xxxi. figs. 3", 3", p. 274. (F. E. Edwards CoU.) 



Horizon and Localities. 



Middle Eocene. — Brackhsham Beds. Bracklesham Bay ; Bramshaw ; 

 Brook. 



Pleurotoma crebrilinea, Edwards, 1860. 



Pleurotoma crehrilinea. 



Mon. Pal. Soc. 1800, pi. xxx. figs. O'-O"^, p. 290. (F. E. Edwards Coll.) 

 Horizon and Locality. 



Middle Eocene. — Bi-achlesham Beds. Stubbington. 



Pleurotoma denticula, Basterot, 1S25. 



Pleurotoma denticula. 

 U6m. Soc. Hist. Nat. Paris, 1825, vol. 2. pi. iii. fig. 12, p. 63. 



Pleurotoma plebeia. 



Dixon's 'Sussex,' 1850, pi. vi. fig. 23, p. 184. (Dixon CoU.) 



Forbes's ' Isle of Wight,' Mem. Geol. Surv. 1856, pi. v. figs. 1-1", p. 154. 



Pleurotoma denticula. 



Mon. Pal. Soc. 1860, pi. xxx. figs. 7^-7^ p. 286. (F. E. Edwards Coll.) 



Horizons and Localities. 

 Oligoeene. — Headon Beds. Lyndhurst; Brockenhurst. 

 Upper Eocene. — Barton Beds. Barton ; High Clifi': Alum Bay (no. 29 



Bed). 

 Middle Eocene. — Brackhsham Beds. Bracklesham Bay ; Huntingbridge ; 



Brook; Bramshaw; Stubbington. 



Pleurotoma denticula, var. longaeva, Edwards, 1860. 

 Pleurotoma denticula, var. longceva. 



Mon. Pal. Soc. 18G0, pi. x.xx. fig. 7", p. 287. (F. E. Edwards CoU.) 

 Horizon and Localities. 



Lower 'Eocene.— London Clay. Highgate ; Southampton ; Potter's Bar. 



Pleurotoma denticula, var, macrobia, Edwards, 1860. 

 Pleurotoma dentiatla, var. macrobia. 



Mon. Pal. Soc. 1800, pi. xxx. fig. 7", p. 287. (F. E. Edwards Coll.) 

 Horizon and Localities. 



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



