NuttaU and Sfi-angeways 



donkey-bloods (, 3, and b, 5, xr. '02) and one zebra blood (13, x. '02, 

 No. 903, see above) were tested. 



Anti-zeltra 

 Jk 



Wood of Precip. /o 



Zebra -012 100 



Donkey b -010 83 



Donkey -008 66 



Horse -008 66 



5. Quantitative Tests with Anti- Marsupial Serum. 

 Tests with Anti-Wallaby Serum (1. vi. '02). 



The antiserum was obtained by treating a rabbit with the serum of 

 Onychogale unguifera (No. (ill). The antisenmi was weak. Nine mar- 

 supial bloods were tested, of which 8 reacted as follows : 



Precipitum 

 Blood of 



Oil Onyehogale nnguifera 



488 



503 



459 frenata 



512 Macropus bennetti 



487 Petrogale xanthopus 



484 ,, penicillata 



482 Thylacinus cynocephaluR 1. ii. 02 yielded no precipitnm, as did also the blood of 

 3.j non-marsupial mammalia, including I'rinii/lfi (7), I'urmpnra (11), I'ngulata (13), 

 Ci'tncfd (1), Kmlfiitiii (3). 



The serum which gave the greatest iirccijiitum with antiserum was 

 the one (611) used for treating the rabbit. In the absence of records 

 regarding the diseases from which the animals suffered it is impossible 

 to offer an explanation of the low tigmvs observed in the precipitum in 

 bloods 611, 488, .50.3. Nevertheless we see the antiserum excluding all 

 other bloods than those of the Marsupialia, excepting that of the carni- 

 vorous Thylacine, upon which it failed to act. 



