1908.] ox TRrPAXOSOMES FROM BRITISH FRESHWATER FISHES. 785 



A Martial Hawk-Eagle (S'phaetas belUcosus), from S. Africa, 

 presented by R. P. Burra, Esq., on Aug. 11th. 



A Tiger-Bittern (Tiyrisoma brasiliense). fi'om Manaos, Brazil, 

 pi'esented by Col. Don Pedro Suarez, on Aug. 13th. 



September. 



The registered additions to the Society's Menageiie during the 

 month of September were 197 in niimber. Of these 91 were 

 acquired by presentation, 10 by pui^chase, 34 were received on 

 deposit, 3 by exchange, and 59 were born in the Gardens. The 

 total number of departures during the month, by death and 

 removals, was 161. 



Amongst the additions special attention may be called to the 

 following : — 



Two Aye- Ayes {Chiromijs madagascariensis), fi'om Madagascar 

 purchased on Sept. 12th. 



One Tiger {Fells tigris soudaica), (S , from Deli, Sumatra, 

 deposited on Sept. 11th. 



One Jaguar [Felis oiica), from Marajo, jjresented by G. L, 

 Andrews, Esq., on Sept. 4th. 



One Black-rumped Duiker {Cjephaloplius tnelanoy-heus), new to 

 the Collection, from Bengiiela, presented by H. F. Yarian, Esq., 

 on Sept. 12th. 



Six White-throated Pigeons {Colicmba albigularis), from the 

 Moluccas, deposited on Sept. 24th. 



Two South- American Mudfish (Lejndosiren paradoxa), from 

 Para, new to the Collection, presented by the Goeldi Museum on 

 Sept. 4th. 



Professor E. A. Minchin, M.A., Y.P.Z.S., exhibited some 

 drawings of trypanosomes and trypanoplasms of fi'eshwater fishes 

 (pike, tench, bream, perch, and eel) studied by him at Sutton 

 Broad Laboratory. After some remarks upon methods of obtain- 

 ing and studying these blood-parasites, he pointed out that thei^e 

 were many problems connected with them still unsolved, particu- 

 larly those relating to their transmission from fish to fish. It 

 was generally believed that the infection of fish was effected by 

 the intermediary of leeches. A great obstacle to the study of 

 these questions was the lack of ;iny monographs dealing with 

 leeches in a general way, no such work having been published 

 since that of Moquin-Tandon in 1846, and the hope was ex- 

 pressed that some zoologist would produce a handbook or mono- 

 graph of the British leeches. Such a work would be of the 

 gi^eatest assistance to those studying fish-trypanosomes, a group 

 of parasites which might one day become of great economic 

 importance. 



