TAB. XXVI. 



Fig. 



1. Pleurotoma crassa. No. 138, p. 212. 



a. Back view, young shell, from Southampton. 



b. Back view, shell of mid-growth, from Shenfield. 



c. Back view, ditto, from Shenfield. 



d. Back view, adult shell, from Nuneham. 



2. Pleurotoma cocciphora. No. 143, p. 217. 



Back view, adult shell. 



3. Pleurotoma planetica. No. 1 39, jo. 212. 



Back view, shell of nearly full growth, from Bramshaw. 



4. Pleurotoma cymsea. No. 142, p. 215. 



a. Back view, shell of mid-growth, from Brockenhurst. 



b. Back view, adult shell, from ditto. 



5. Pleurotoma dentata. No. 146, p. 220. 



Back view. 



6. Pleurotoma Keelei. No. 145, p. 219. 



Back view, nearly adult shell, from Shenfield. 



7. Pleurotoma textiliosa. No. 147, p. 222. 



Side view, shell from Bracklesham Bay. 



8. Pleurotoma rostrata. No. 144, p. 218. 



a. Side view, shell past mid-growth, from Barton. 



b. Back view, adult shell, from ditto. 



c. Front view, adult shell, from Highcliff. ( Var. antiqua.) 



9- Pleurotoma laevigata. No. 152, p. 227. 



a. Side view, shell of mid-growth, from Barton. 



b. Back view, adult shell, from ditto. 



10. Pleurotoma crassicosta. No. 150,^.225. 



a. Front view, adult shell. 



b. Back view, ditto. 



11. Pleurotoma lanceolata. No. 151, p. 226. 



a. Front view, adult shell. 



b. Back view, ditto. 



12. Pleurotoma exorta. No. 148, p. 223. 



a. Side view, adult shell. 



b. Back view, ditto. 



13. Pleurotoma macilenta. No. 149, p- 224. 



a. Front view, adult shell, from Barton. 



b. Back view, adult shell, from ditto. 



