Aquatic Amphibians 211 



the young of the flat, triangular-headed 

 Pipa should be hatched in the form of 

 tadpoles. Not so, however. The eggs, 

 up to 100 in number, are deposited with 

 the help of the male upon the back of 

 the female where they sink into the skin, 

 which during breeding season becomes 

 spongy and yielding. The cavities so 

 formed become covered after a few days 

 with a horny lid. Nearly three months 

 later the young ones lift up the lids and 

 emerge as perfect little toads, having 

 spent their entire tadpolehood in the 

 holes of the maternal bagatelle-board. 

 The following account of the breeding 

 of specimens in our Zoological Gardens 

 has been given by Bartlett : t( About 

 April 25, the males became very lively, 

 and were constantly heard uttering their 

 most remarkable metallic call-notes. On 

 the following morning, Tennant, the 

 keeper, arrived in time to witness the 

 mode in which the eggs were deposited. 



