Nvttall and Strcoif/ewaf/s 



321 



Of other mammalian sora of approximately the same age several 

 reacted as follows, Human serum being taken to give a precipitum of 

 100 (Reactions with antiserum I.): 



Carnivora : Cat and Dog 117o> Hyaena striata 8 "/a, Seal but a trace. 

 Unijulatn : Zebra 11 "/o- Iiinectivom : Hedgehog 'ii'%, Mole bnt a trace. 

 Marsupialia : Petrogale C/o- 



Tests ivith Anti-Ourang Serum (7. i. '03). 



The rabbit yielding the antiserum was treated with the serum 

 of Simla satyrus (906). 



Owing to the weakness of this antiserum the measurements of the 

 smaller amounts of precipitum given by the .serum of one other mammal 

 cannot be considered accurate. Thus the blood of the Ox (1. i. '02) 

 gave the percentage 34 "/„. The sera of all other Mammalia gave no 

 measurable precipitum, the bloods tested being as follows: Insectivora : 

 Hedgehog and Mole. — Carnivora: Cat and Dog. — Ungulata: Sheep, 

 Deer, Llama, Horse, Donkey, Pig. — Cetacea: Balaenoptera (two examples) 

 and Phocaena communis. — Rodentia : Rabbit, 



It will be seen that the Primate bloods stand in the same relation 

 to each other as in the series with anti-human serum, and what is 

 more that the percentages approximate closely to those obtained with 

 anti-human .serum No. II. 



2. Quantitative Tests with Anti-Insectivore Serum. 



Tests witJi Anti-Hedgehog Serum. (18. x. '02). 



In view of the limited number of Insectivore bloods and the negative 

 results obtained by qualitative tests with this antiserum upon other 

 bloods than those belonging to this order, only a small series was 

 tested. Although very powerful, this antiserum produced practically 

 no effect on any other blood : 



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