No. 98. 



ABSTRACT OF THE PROCEEDINGS 



OF THE 



ZOOLOGICAL SOCIETY OF LONDON.^ 



June lath, 1911. 



Edwin T. Newton, Esq., F.R.S., in the Chair. 



The Minutes of the last Scientific Meeting were confirmed. 



Mr. H. G. PuMMER, F.R.S., Pathologist to the Society, pre- 

 sented a Report on the Pathological Examination of Rats caught 

 in the Regent's Park and in the Society's Gardens. 500 rats 

 had been examined between the 1st of January and the 17th of 

 May, 1911, all in a precisely similar manner. The sj)leen, lungs, 

 glands, and blood were examined microscopically ; and from 

 any animal which looked in any way unhealthy cultures were 

 made. 



The results were summarized as follows : — 5 rats were caught 

 in the Park, and 495 in the Gardens : 283 of these were males 

 and 217 females. 



3 rats had tubercle, 10 had tapeworm cysts in the liver, 49 had 

 Trypanosoma leioisi in their blood, 2 had empyema(not tubercular), 

 1 had a tumour of the lower jaw (the result of an old injury), and 

 1 had pleuritis and hydrothorax (not tubercular). 



Bacteria were found in 71 rats : in 40 in the lungs, and in 31 

 in the spleen. 



Saccharomycetes were found in the lungs of 16 rats. 



Fleas were found on 4 rats, and lice on 3 rats. 



The general condition of the rats was very good, and in none 

 was anything at all suspicious found. 



* This Abstract is published by the Society at its offices, Zoological Gardens, 

 Eegent's Park, N.W., on the Tuesday following the date of Meeting to which 

 it refers. It will be issued, along with the 'Proceedings,' free of extra charge, 

 to all Fellows who subscribe to the Publications; but it" may be obtained on the 

 day of publication at the price of Sixjjence, or, if desired, sent post-free for 

 the sum of Six Shillings per annum, payable in advance. 



