AMPHIBIAN MIGKATIOK. 



17 



Table III. 

 (a) Impm'fsd JVewts. 



(b) Native Newts. 



favourable position for the JS'ewts from which to find the pooi. 

 It was a gentle incline down, and they would njttufally walk dow|> 

 it. On the other hand, if they turned tq the right, they were 

 confronted with the steep gradient Z which in all probabiUty 

 they would not negociate. The hedge qn the left was the only 

 thing which may have lured them away frorn the right path. 

 In 1910 the numbpr of natives in th^ pool was tvyenty-two. Ii^ 

 1911 this supply had fallen to twelve, and two of these stilj 

 bore marks, sufficiently clear for me to be able to identify them 

 as belonging to batches of native Newts get free the previous 

 year. These two at all events must have wintered near the 

 pool and returned to it in the spring. The decrease in the 

 supply of natives in the spring of 1911 may be explained when 

 I say that seven of the original twenty-two were accidentally 

 killed before they could be returned to the pond at the close of 

 Proc. Zool. Soc— 1912, No. II. 2 



