PLATE 3— Continned. 



Page. 



Fig. 24. Crania GREOAEiA 29 



24. A large bivalve shell with numerous individuals of the Crania attached to its surface. There 

 are also the remaias of the ventral valves of C. hamiltonice, and the smaller ones are 

 perhaps only the yoang of that species. 



Figs. 2.5, 26. Crania leoni ? 30 



26. The dorsal valve of this species. 



26. A profile of the same. 



Figs. 27-30. Crania leoni 30 



27. Dorsal valve retaining the shell, supposed to be of this species. 



28. Profile of the same. 



29. The cast of a dorsal ? valve of this species. 



30. The cast of a ventral 1 valve of the same. 



