50 AMPHIBIANS AND FISHES. 



mentioned, are the best food for the smooth newts. 

 If these are supplied in abundance the newts will 

 rarely leave the tank. Indeed, there is much reason 



Fig. 14. 



Fig- 



Tadpole in egg eight days after laying. 

 The arrows indicate the current motion 

 caused by the cilia. The dotted lines show Development of tadpole in egg 

 the increased growth eleven days after the seventeen days after the laying of the 

 egg was laid. egg. 



Fig. I 6. 



Earliest stage of the/rfe tadpole of smooth newt a, claspers ; />, fore- 

 leg partly developed ; c, circulation of the blood ; d, transparent fin ; 

 e, branchiate, or gill-tufts. 



to suppose that one cause of their leaving is the ab- 

 sence or shortness of food supplies. They are very 

 curious animals, and will come to the inner surface of 

 the glass of the tank to examine anything unusual, 



