68 



INTRODtJOTION. 



Bibfo 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 



Tig. 25. 



Pairs in embrace. A. Discoglossns pictus. B. Pelodytes pimdatus. 



Batrachians. The female is seized by tjie 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. 



