PLATE VIII. 



PAGE 



Fig. 49. Lucina. (Here) Kichthofeni. Magnified. 29 



49 a. Side view showing the convexity and the position of the lunular pit. 

 49 b. Hinge. 



Fig. 50. Crassatella collina. Natural size. 29 



Fig. 51. Mttilus Mathewsonii. Natural size. 30 



Fig. 52. Modiola MUL'i iradiata. Natural size. 30 



