U. S. B. F— Dr 



PLATE XVI. 



FIG. 1— EGG MASS OF BULLFROG; A SURFACE FILM 18 INCHES IN 



DIAMETER LAID AMONG DEAD STICKS AND OLD BOARDS. 



(After Wright, Carnegie Publ. No. 197.) 



2.— A SURFACE PACKET OF TREE-TOAD EGGS ATTACHED TO A 

 POND-WEED LEAF. 



(After Wright, Carnegie Publ. No. 197.) 



