JVutfaU and Stranffeway.^ 



333 



donkey-bloods (of, 3, and h, 5, xi. '02) and one zebra blood (13, x. '02, 

 No. 903, see above) were tested. 



5. Quantitative Tests with Anti- Marsupial Serum. 



Tests luith Anti-Wallahy Serum (1. vi. '02). 



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

 Onychogale unguifera (No. 611). The antiserum was weak. Nine mar- 

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



482 Thylacinus cynocephalus 1. ii. 02 yielded no precipitum, as did also the blood of 

 3;j non-marsupial mammalia, including I'lhiidtes (7), I'urnivora (11), I'uguhita (13), 

 Cetaceo (1), Rodent ia (3). 



The serum which gave the greatest precipitum 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 figures observed in the precipitum in 

 bloods 611, 488, 503. Nevertheless we see the antiserum excluding all 

 lither bl(X)ds than those of the Marsupialia, excepting that of the carni- 

 vorous Thylacine, upon which it failed to act. 



