MR. OLDFIELD THOMAS ON AN AMAZONIAN MONKEY. 3 



he had obtained from an Axolotl placed in special conditions, 

 with the object of inducing the metamorphosis. 



Mr. D. Seth-Smith, F.Z.S., Curator of Birds, gave a lantern 

 demonstration of photographs of the young of Hemprich's Gull 

 (Larus hemjirichi), of the Black-necked Swan {Cygmis melano- 

 cori/2)/ms), and of the White Stork {Oiconia alba) which had been 

 hatched in the Society's Gardens during the year. 



Three specimens of Larus hempriclvi had lived in the Gardens 

 since 1906, but had shown no inclination to breed until the 

 summer of 1912. In July a pair kept in the Great Aviary 

 constructed a nest, composed of a few bits of grass and leaves, 

 under a bush, laying two eggs of a pale greenish-grey colour,, 

 spotted and blotched with bluish grey and olive-brown. As there^ 

 were birds in the aviary which would have devoured the young,, 

 the eggs were taken Avhen just about to hatch and placed under- 

 a bantam. Both hatched, but one died on leaving the shelL 

 The other was successfully raised to maturity. The colour of the- 

 down was pale sandy- whitish, without any definite markings, 

 though the back was of a darker shade than the underparts. In 

 the first plumage it was of a buffish-broAvn colour, the feather's 

 having paler edges. 



The Black-necked Swan had not bred in the Gardens for over 

 thirty years until the past summer, when two cygnets were 

 hatched, one of which was successfully reared to maturity. The 

 cygnets, which are pure white in colour when hatched, have a 

 second down plumage of a dirty buflish-brown colour. 



The White Storks, kept in the large flying aviary with the 

 Seagulls, had hatched five young birds, which unfortunately died 

 when from two to three weeks old. 



Mr. Seth-Smith also showed slides of the nest, in a tree near 

 the Apes' House, made by the large Sumatran Orang-utan {Simia 

 satyrus) which escaped from its cage on November 3rd, 1912 

 (Plate IX.). Mr. R. I. Pocock gave an account of the escape and. 

 subsequent capture of the Orang-utan. 



November 26, 1913. 



Dr. A. Smith Woodward, F.R.S., Vice-President, 

 in the Chair. 



Mr. C. Tate Regan, M.A., F.Z.S., exhibited male and female 

 examples of Cynolebias hellottii, a Cyprinodont Fish from the 

 La Plata, to illustrate the remarkable sexual characters. 



Mr. Oldfield Thomas, F.R.S. , F.Z.S., exhibited a specimen of 

 an Amazonian monkey referable to a species he had described in 



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