PLATE V. 



Fm. 



1. Pecten orbicularis, var. magnus, Kpug., Upware. 



2. Avicula Cornueliana, d'Orb., Upware. 



3. Perna, sp. nov., Upware (Coll. J. F. Walker, M.A.). 



4. Plicatula Garteroniana, d'Orb., Upware. 



5. Plicatula equicostata, Kpng., Upware. 



6. Lima longa, Romer, Upware. a, a decorticated specimen; h, 



round ribbed, elongated type, d, flat ribbed variety. 



7. Area Carteroni, d'Orb., Upware. a, umbonal view; h, back view; 



c, the ribbed surface, magnified. 



8. Cucullaea, sp., Upware. 



9. Pectunculus lens, Sby., Upware. b, interior, shewing teeth; c, 



surface magnified. 



10. Cucullaea subnana, Pictet and Roux, Upware. 



11. Pectunculus Marullensis, Leym., Upware. 



12. Lima Farringdonensis, Sharpe, Upware. b, section across the 



ribs ; c, surface of ribs, magnified. 



