Fig. 
9. Pleurotoma bracheia. No. 184, p. 263. 
a. Side view, magnified; from Barton. 
6. — Ditto, ditto. 
10. Pleurotoma vicina. No. 188, p. 266. 
a. Side view, magnified ; from Alum Bay (Strat. No. 29, Prestw.) 
6. Front view, ditto. 
11. Pleurotoma undata. No. 183, p. 261. 
a. Back view, nat. size; from Stubbington. 
6. Front view, ditto. 
12. Pleurotoma sindonata. No, 185, p. 263. 
a. Side view, magnified ; from Stubbington. 
6. Front view, ditto. 
13. Pleurotoma subula. No. 190,.p. 267. 
a. Back view, nat. size; from Basingstoke. 
b. Ditto, magnified. . 
14. Pleurotoma aspera. No. 197, p. 273. 
a. Back view, nat. size ; from Barton. 
b. Side view, “ditto; from Highcliff. 
15. Pleurotoma Koninckii. No. 204, p. 279. 
a. Front view, nat. size; from Railway Tunnel, Hampstead. 
6. Back view, ditto. 
16. Pleurotoma Wetherellii. No. 211, p. 285. 
a and d. Back views of young shells, nat. size ; from Highgate. 
b. Back view of adult shell, ditto; (Mus. Weth.) 
C. Front view of ditto.. - 
17. Pleurotoma Selysii. No. 203, p. 278. 
a. Front view of shell of mid-growth, nat. size; from Muswell Hill 
(Mus. Weth.) .. 
&. Side view ditto, ditto. 
c. Back view of adult shell, nat. size (dus. Weth.) 
d. Ditto — of shell of mid-growth, ditto (ditto). 
