PLATE II 



The Development of the Frog's Egg 

 The upper sixteen figures are in pairs, the left one showing a 

 side view, the right a top view, of one stage. Lower left-hand 

 figure, a newly hatched tadpole. Above it, an end and side view 

 of an earlier stage. At right, a back and end view of stage showing 

 developing spinal cord and brain. 



