108 GASTEROPOBA. 



Pleurotoma exorta, Solandor, 1760. 



Murex e.nn-tiis. 



Brander's ' Foss. Ilant.' 1766, pi. ii. fig. 32,.p. 20. 



Pleurotoma c.vorta. 



Mineral ConcLolon-v, 1816, pi. 146. fig. 2. (Sowerbv Coll.) 



Mon. Pal. Soc. ISo'C, pi. x.wi. figs. Vl"; 12^ p. 22-3. " (F. E. Edwards CoU.) 



Horizons and Localities. 



Upper Eocene. — Barton Beds. Barton ; Ahini Bay (no. 29 Bed). 

 Middle Eocene. — BracMesham Beds. Bracldeshaiu Bay. 



Pleurotoma fusiformis, J. do C. Sowerbv. 



I'teiirotoma fusiformis. 



Mineral C'oii("liol(.)gv, 182.3, pi. 387. fig. 1. 



Mon. Pal. Soc. 1856, pi. xxvii. tigs. 1", l", p. 228. (VVetlierell Coll.) 



Horizon and Localities. 



Lower Eocene. — London Clay. Finchley ; Ilightrate. 



Pleurotoma gonisea, Edwards, 1850. 



PhuriitoyiKi Iranscersaria. 



IJixon's ' Sussex,' 1850, p. 102 {non Lamarcli). 



Pleurotoma (i<mia!a. 



Mon. Pal.' Soc. 1856, pi. xxv. fig. 10, p. 213. (F. E. Edwards Coll.) 



Horizon and LMcalities. 



Middle Eocene. — BracMesham Beds. Bracklesham Bay ; Stubbington. 



Pleurotoma helix, Edwards, 1856. 



Pleurotonia /leli.v. 

 Mon. Pal. Soc. 1856, pi. xxv. figs. 7", 7^ p. 209. (Wetberell Coll.) 



Horizon and Localities. 



Lower Eocene. — London Clay. Potter's Bar ; Iligligate ; Alum Bay (no. 4 

 Bed) ; Hampstead ; Haverstock Hill. 



Pleurotoma helix, var. ricna, Edwards, 18o0. 



Pleurotoma heli.v, var. ricna. 

 Mon. Pal. Soc. 1856, p. 209. 



Horizon and Locality. 



Lower Eocene. — London Clay. Potter's Bar. 



Pleurotoma inarata, J. de C. Sowerbv, 1850. 



Pleurotoma inarata. 



Dixon's ' Sussex.' 1850, pi. vi. fig. 21, pp. 102, 183. (Dixon Coll.) 

 Mon. Pal. Soc. 1850, pi. xxv. fig. 0, p. 208. (F. E. Edwards Coll.) 



Horizons and Localities. 



Upper Eocene. — Burton Beds. Barton. 



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

 bridge; Whitecliil'Bay. 



Pleurotoma Keelei, Edwards, 1850. 



Pleurotoma Keelei. 



Mon. Pal. Soc. 1866, pi. xxvi. fig. 6, p. 219. (F. E, Edwards Coll.) 



