PLATE XVI 



PAGE 



Fig- 17. Tapes Staleyi. 57 



17 a. Hinge. 



Fig- 18. Saxidomus gibbosus. 58 



18 a. End view. 



18 b. Hinge. 



Fig- 19. Pecten Peckhami. 59 



19 a. Lower valve, to show the emarginate ear. 



Fig- 20. Janika BELLA. 105 



