168 Tests loith Precipitins 



(2 — 3) Tests with Antisera for Simiidae. 



The first to obtain antisera for the Simiidae was Grlinbaum (18, I. 

 1902, p. 143), who treated rabbits with the blood of the gorilla, ourang- 

 outang, and chimpanzee, obtaining as many antisera, all of which 

 acted upon their homologous bloods, as well as upon those of the 

 related species, and man. Griinbaum was unable to " assert that 

 there is any difference of reaction " amongst these bloods to the several 

 antisera above-named. Dr Grlinbaum, knowing of my investigations, 

 very kindly sent me some of his anti-gorilla and anti-chimpanzee serum, 

 so that I might test them upon the bloods of Anthropoidea which I had 

 collected. Unfortunately his anti-gorilla serum had grown so weak 

 that no results of value could be recorded for it. On the other hand, 

 the following table gives the results of tests made with the anti- 

 chimpanzee serum. 



47 Tests ivith Anti-Chimpanzee Serum. 



The anti-chimpanzee serum used in these tests was kindly sent to 

 me by Dr A. S. F. Grlinbaum of Liverpool. It bore the date 24, 1. 1902, 

 and the tests were made on its receipt four days later. The antiserum 

 was weak and 4imited in quantity, and consequently but few bloods 

 could be tested with it, the tests being confined to bloods of Primates. 

 Although the amount of precipitum obtained was small, considerable 

 differences could be noted. 



Eeactious 



3 HoMiNiDAE (European) • . 



3 SiMiiD.\E (2 spec.) 



23 Cercopithecidae (19 spec.) 8 9(39%) G(26n/„) 



12 Cebidae (9 spec.) 11 1 



4 Hapalidae (3 spec.) 1 3 • 



2 Lemueidae 2 



It will be seen that the results are in accord with those obtained 

 with anti-human serum. The proportion of negative results with the 

 bloods of Cercopithecidae and Cebidae was naturally greater because 

 a Aveaker antiserum was used. The results with Cebidae and Ha])alidae 

 do not agree with those obtained with the preceding and two 

 succeeding series, where the Hapalidae gave lower values than the 

 Cebidae. 



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