AMPHIBIAN MIGRATION. 



15 



Result. On April 18tli one of Batch B was caught and two of 

 Batch A. On April 22n(l one more of Batch A was obtained. 



Kxperiment 11. In this experiment four full-grown Palmate 

 Newts were taken from a horse-trough about one foot deep near 

 the experimental pond. The trough was only 2 inches above 

 ground level. Text-fig. 5 shows the nature of the ground around 

 this trough and the point (P) at which these four marked Newts 

 were set loose, together with four young Frogs, also caught in the 

 trough, the eight specimens being the whole of the amphibian live- 

 stock which the trough contained. The Frogs were young — not 

 more than 10 or 11 months old and hatched the previous spring, 

 jutlging from their size. These eight specimens were set loose on 

 April ieth. 



Text-fiij. 5. 



riaii showing the hoi-se-trongh and its surroundings used for homing experiment 



No. 11. 



The spot where they were set loose was deliberately chosen as 

 the most unfavourable one from which the Newts might be 

 expected to be able to return. They were set heading down the 

 slope away from the trough. 



Residt. The ti-ough remained empty until May 16th, when one 

 of the four Newts was I'ecovered. 



