U. S. B. F.— Doc. 



Plate XI M. 



FIG. 1.— A SURFACE FILM OF BULLFROG EGGS ATTACHED TO THE TIPS OF 

 ELDERBERRY BUSHES. 



^ • ;•%' 



FIG. 2.— AN EGG AREA OF LEOPARD- 

 FROG EGGS, THE EGG MASSES ON 

 THE BOTTOM OR ATTACHED TO 

 VEGETATION. 

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



FIG. 3.— A SURFACE FILM OF GREEN- 

 FROG EGGS AMONG VEGETATION. 



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



