348 



Antlsem for Reptllla 



(2) Tests luith Anti-Tortoise Se)'uiu. 



This ;intise'ruiu was prepared by intravenous injections of the serum 

 of a giant Tortoise (Testudo vidua) into a Rabbit. The serum used was 

 collected after the death of the tortoise fr(jm natural causes. 



Percentage 

 of positive 

 * ^ + + reactions 



2(14' 



1 (7" 



5(33"/,,) 2(13%) 



M20 7o) 



23 

 

 

 



66 

 50 

 8 

 12 

 

 

 



Only a small quantity of the tortoise serum was available for })re- 

 paring this antiserum, which was considerably weaker than the preceding 

 one. The results of the tests are, however, very much alike. In this 

 case large reactions with Chelonian sera were obtained in 00 ^/„ as 

 against 87 7o i'l the former, and in 23 7o '^^ against 40 7o of Birds' egg- 

 albumins. Again, the few reactions obtained amongst the rest of the 

 Reptilia Avcre feeble, and the results of tests with Reptile egg-albumins 

 were negative. 



(3) Tests luith Anti-Turtle Serum, 



This antiserum was prepared by the intraperitoneal injection of the 

 blood of a Turtle (Chelone midas) into a Rabbit. The turtle was healthy. 



Although this was a very })owerful antiserum, giving well-marked 

 reactions Avith 60 7o "^ the Chelonia, yet only 20 7o of the Birds' egg- 

 albumins gave any indication of clouding, and in each case the reaction 

 Avas A'ery feeble. Fewer positive results Avere obtained Avith the other 

 specimens of Reptilian bIo(»ds than Avith either of the anti-tortoise sei-a. 



Omitting very feeblf cloudings thi' anti-diclonian sera give Avell- 

 marked reactions with the Chelonia and modi'ratc reactions Avith the 

 Crocodilia. With Birds' egg-albumins moderate cloudings are obtained. 



