PLATE VII. 



PAGE 



Fie:. 42. Tapes Staleyi. Natural size. 24 



*&■ 



Prom a worn specimen. 



Fig. 44. ?T. truncata. Natural size. 25 



44 a. Outline of cardinal angle. 



Fig. 45. Cyrena Californica. Natural size. 26 



Fie;. 46. Cardium Meekianum. Natural size. 27 



Fig. 48. Conchocele disjuncta. Natural size. 28 



48 a. View from above. 



48 b. Hinge. 



