INSECTIVOROUS ANIMALS 



281 



day to day. No aquatic egg is better adapted for such 

 use. It is large enough to be seen with the unaided eye, 



Fig. 116. Aquarium 

 Arranged to collect eggs of a toad 



develops under all sorts of conditions, and the progress 

 is so rapid that interest is sustained to the end. First 

 the egg elongates, then the tiny flat tadpoles hatch and, 



