224 THE SECRETARY ON ADDITIONS TO THE MENAGERIE. 



present owners for a period of over three years. The photographs 

 showed that it was a young animal, and that probably, as in the 

 case of the Giraffe, the Okapi does not reach its adult stage until 

 five or six years of age. 



M]-. E. G. BouLENGER, F.Z.S., exhibited a series of living 

 specimens of British Rats and their varieties, and stated that 

 during the past four years there was evidence that the so-called 

 Old Eni>lish Black Rat had increased in numbers. 



Lt-Col. S. MoNCKTON CoPEMAN, F.R.S., exhibited a series of 

 lantern-slides made from carefully pi'epared charts to illustrate 

 his "Experiments on Sex Determination." 



May 27tli, 1919. 



A. Smith Woodavard, Esq., LL.D., F.R.S., "Vice-President, 

 in the Chair. 



The Secretary read the following Report on the Additions 

 made to the Society's Menagerie dni'ing the month of April 

 1919: — 



The registered additions to the Society's Menagerie duiing the 

 month of April were 148 in number. Of these 50 wereacqvured 

 by presentation, 20 were deposited, 1 was received in exchange, 

 and 77 were purchased. 



The folloAving may be specially mentioned : — 



5 Californian Sea-Lions {Otaria californiana), from California, 

 purchased on April 19th. 



1 Brown Bear {Ursus arctos), from Murmansk, presented by 

 the Captain and Officers of H.M.S. ' Ecellent ' on April 30th. 



1 Moutlon (Ovis omisimon) (Sardinia); 6 Llamas {Lama 

 glama) (Peru), bred in Europe ; 1 Hybiid Zebra and Donkey 

 {Equus grevyi X E. asinus), bred in Europe, deposited by H.G. 

 The Duke of Bedford, K.G. 



2 Bennett's Wallabies {Macro'pus hennetti) (Tasmania), bred in 

 Sussex, presented by Sir Edmund Loder, Bt., on April 16th. 



1 Dusky Parrot (Piomis ftiscus) (Guiana), received in exchange 

 on April Ist. 



5 Black -necked Swans {Cygiius inelanocorypltus) (Southern 

 South America), purchased on April 17th. 



