438 TrrE secuictary on additions to the menagerie. 



June 1st, 1920. 



Sir Sidney F. Harmer, K.B.E., F.ll.S., Vice- President, 

 in the Chair. 



In tlie absence of Prof. 11. T. Leiper, F.Z.S., his exhibition of 

 lantern-slides iUustrating tlie Experimental transmission of some 

 Helminth infections, was described by Dr. Vevers. Specimens 

 of Schilbe mystus^ Clarotes laticej^s, and Tilapia nilotica infected 

 with encysted trematode larvte, and fonnd near Cairo, were 

 shown. By feeding young wolves, bred in captivity, with these 

 fishes Prof. Leiper succeeded in rearing the adult worms in 

 enormous numbers. The cysts of Schilbe mystas gave rise to 

 Hemisioma {Alaria) alatum of the dog, and those of Clarotes 

 laiiceps to Afonostoma jntinilio Looss. J/, piiviilio, which would 

 appear to l)e more closely related to 7'ocotrema than to Monostoma, 

 is noi'nially a parasite of the Pelican and Kite in Egypt. That 

 it can be i-eared in enormous numbers in Wolves undermines the 

 conceplion of "physiological species"' applied by Looss to certain 

 trematode iLfections. 



Dr. P. Chalmers Mitchell, F.ll.S., gave an account, illustrated 

 with lantern-slides, of his recent Aeroplane Ti'ij") from Caii'O to 

 Tabora, and described the character of the country passed over 

 and the birds and mammals seen. 



June 15th, 1920. 



Prof. E. W. MacBride, F.R.S., Vice-President, 

 in the Chair. 



The Secretary read the following Eeport on the Additions to 

 the Society's Menagerie during the month of May, 1920 : — 



The registered additions to the Society's Menagerie dui-ing the 

 month of May were 398 in number. Of these 63 were acquiied 

 by presentation, 188 were deposited, 130 were purchased, 4 were 

 received in exchange, and 13 were born in the Menagei'ie. 



Tiie following may be S23ecia,lly mentioned :' — 



Mammalia. 



1 Cheetah [Cynceliirus jnbatns), from Kilosso, Tanganyika 

 Territor}^ presented by C. MacMahon, Esq., Assistant Political 

 Officer of Kilosso, on May 1st. 



2 Capybaras (Jlydrochoinis hydrochoerns), bred in England, 

 purchased on May 12th. 



1 Arabian Oiyx [Oryx leucory.v), from Central Arabia, depo- 

 sited by H.M. The King on May 14th. 



