PLATE V. 



Fio. 



1. Pecten orbicularis, var. magnus, Kpng., Up ware. 



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



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



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



5. Plicatula equicostata, Kpng., Upware. 



6. Lima longa, Rbmer, Upware. a, a decorticated specimen ; 6, 



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



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



c, the ribbed surface, magnified. 



8. Ciicullaea, sp., Upware. 



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



surface magnified. 



10. Cucullaea subnana, Pictet and Roux, Upware. 



11. Pectuncidus Marullensis, Leym., Upware. 



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



ribs ; c, surface of ribs, magnified. 



