PLATE VI. 



Fio. 



1. Pectunculus obliquus, Kpng., Up ware, a, b, single valve; c, d, 



perfect specimen. 



2. Modiola pedernalis, Homer, Upware. 2 b, enlarged f. 



3. Modiola obesa, Kpng., Upware. 



4. Cardium Cottaldinum, d'Orb., Upware (in the cabinet of Mr J. R 



Walker, M. A.), a, back view ; b, anterior view ; c, interior. 



5. Cypricardia squamosa, Kpng., Upware. a, back view; b, interior; 



c, enlarged. 



6. Cypricardia arcadiformis, Kpng., Upware. 



7. Cardita rotundata, Pictet and Roux, Upware. 



8. Opis Neocomiensis, d'Orb., Upware. a, back view; b. umbonal 



view ; c, anterior view. 



9. Astarte, sp. nov., Upware. b, interior (Coll. Mr J. F. W.). 



10. Astarte, sp., Upware. 



1 1 . Astarte subdenlata, Rb'mer, Upware, 



12. Cyprina Sedgwickii, Walker, sp., Upware. c, hinge. 



13. Cyprina obtusa, Kpng., Upware. 



14. ? Thracia, sp., Upware. 



