68 



INTRODUCTION, 



Bufo vulgaris often breed in the same place, we always 

 find the tadpoles forming distinct colonies. A dip of 

 the net will secure specimens of one species only. 

 Courtship does not take place in any of the tailless 



Fig. 25. 



•w 







.— 



/ W 



Pairs in embrace, a. Discoglossus pictus. B. Pelodytes punclatits. 



Batrachians. The female is seized by the first comer, 

 and when he has once secured his hold he will remain 

 for a period varying between a few minutes and 

 several days in possession until the evacuation of the 

 ova, unless he be dislodged by a stronger competitor. 



