1893.] ROy. W. ROTHSCHILD OlSr ECG OP DTJCK-BILL, ETC. 505 



June 6, 1893. 



Sir W. H. FtowEE, K.C.B., LL.D., F.E.S., President, in the 



Chair. 



The Secretary read the following report on the additions to the 

 Society's Menagerie during the month of May 1893 : — 



The total number of registered additions to the Society's Mena- 

 gerie during the mouth of May was 165, of which 61 were by 

 presentation, 8 by birth, 54 by purchase, 2 by exchange, and 40 

 on deposit. The total number of departures during the same 

 pei'iod, by death and remo,vals, was 104. 



Amongst the additions I may invite special attention to the 

 following : — 



A young female Water-buck (Cohus elliiysiprymnus), born in the 

 Menagerie May 4, 1893, being, so far as is known, the first Antelope 

 of this species that has been bred in captivity. 



For our pair of this beautiful species we are indebted to the 

 liberality of Mr. G. S. Mackenzie, F.Z.S. The male was received 

 June 30, 1890 (see P. Z. S. 1890. p. 589), and the female on 

 May 26, 1891 (see P. Z. S. 1891, p. 326). Both of these animals 

 were obtained in the territory of the British East African Company, 

 where the species appears to be abundant (see AVilloughby's ' East 

 Africa and its Big Game,' page 288). 



I exhibit a water-colour drawing by Smit (Plate XXXIX.) of 

 this interesting young animal, which generally resembles the adult, 

 though perhaps rather more rufous in colour. 



The Council have resolved to present to Mr. G. S. Mackenzie 

 the Silver ]\Iedal of the Society in recognition of this successful 

 addition to the list of acclimatizable Antelopes. 



The Hon. "Walter EothschUd, F.Z.S., exhibited and made remarks 

 upou the following objects : — ■ 



1. A specimen of the egg of the Duck-bill (OrnithorJiyncJius 

 anatimis), stated to have been taken out of the pouch of the mother 

 in Queensland. 



2. The leg-bones of a large species of 2Epyornis from South- 

 western Madagascar, together with a perfect egg of the same extinct 

 bird. 



3. An enlarged photograph, by Mr. Williams of Honolulu, 

 representing an enormous colony of Albatrosses on Laysan Island, 

 in the North Pacific. The Albatross portrayed was the new 

 species, Diomedea immutahilis, lately described by Mr. Eothschild, 

 Bull. B. O. C. no. ix p. xlviii. The breeding-colony of this species 

 was stated to occupy an area of nearly four square miles in Laysan 

 Island. Another area of about two square miles in the same island 

 was occupied by Diomedea hrachyura. 



4. A series of Lepidoptera from Jamaica, with their accompany- 



