172 



Tests ivith Precipitins 



of this antiserum very well demonstrates a f;xct to which I have already 

 drawn attention, namely that a weak antiserum is more limited in its 

 action. 



II. Antisera for bloods of Insectivora. 



Uhlenhuth (25, vii. 1901) treated rabbits with the serum of the 

 hedgehog {Erinaceus europaeus) and obtained an antiserum which only 

 acted on the blood of the hedgehog, he tested 24 bloods as follows : — 



Man, hedgehog, bat, dog, fox, cat, pig, deer, ox, sheep, goat, horse, 

 donkey, rabbit, guinea-pig, rat, mouse. Fowl, pigeon, owl, crow, sparrow, 

 duck, goose. 



383 Tests with Anti-Hedgehog Serum. 



The following tests were made with a powerful antiserum (Preci- 

 pitum = '022 c.c.) obtained by injecting a rabbit with the mixed serum 

 of four Ei-inaceus eurojiaeus (No, 135). In view of the continued 

 negative results with different anti-mammalian sera upon non-mamma- 

 lian bloods, these tests were limited to mammalia. 



85 Primates 83 



27 Chikoptera 2G 



15 Insectivora (4 families) 



6 Erinaceus europaeus 



1 Crocidura coerulea 1 



6 Talpa europaea 6 



2 Centetes ecaudatus 1 



92 Carnivora 87 



58 eodentia 58 



G5 Ungulata 60 



3 Cetacea 3 



12 Edentata 12 



25 Marsupialia 25 



1 Monotremata 1 



Keactions 



/o 

 2 

 3 



100 

 

 

 50 

 5 

 

 7 

 

 

 

 



With other than its 



homologous serum 



3-5 »/o 



The foregoing table shows a very limited action on the part of this 

 antiserum, only the blood of Erinaceus eurojMeus giving a full reaction. 

 The tests with other Insectivora were negative, with the exception of 

 one sample from Centetes ecaudatus Avhich only gave a faint reaction 

 such as was observed in a few instances amongst the other manunalia. 



