1893.] HOX. W. EOTHSCHILD OS EGG OF DUCK-BILL, ETC. 505 



June 6, 1893. 



Sir W. H. Flowee, 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 inonth of May 1893 : — 



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

 gerie during the month o£ 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 

 period, by death and removals, AA'as 104. 



Amongst the additions I may invite special attention to the 

 following : — 



A young female Water-buck (Cohiis ellipsijynjmnus), born in the 

 Menagerie May 4, 1893, beiug, 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. Gr. 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 Grame,' 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 IMedal of the Society in recognition of this successful 

 addition to the list of acclimatizable Antelopes. 



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

 upon the following objects : — 



1. A specimen of the egg of the Duck-bill (Ornit?ioi-Ji;/iichiis 

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

 in Queensland. 



2. The leg-l)ones of a large species of ^jiyomis 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 enoi-mous colony of Albatrosses on Laysan Island, 

 in the North Pacific. The Albatross portrayed was the new 

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

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

 was stated to occupy an area of noarly four s<|uare miles in Laysan 

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

 was occupied by Diometha /irficJu/nra. 



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



