Graham-Smith S.lli 



This antiserum was veiy feeble and failed to react except with the 

 blood of" four Snakes and one Chelonian {Testudo ihera). Even with 

 its homologous serum the reaction was feeble. 



Sinninari/ of re.sidts of Qualitative Tests with Anti-Reptiliaji Sera. 



The anti-reptilian sera may be divided into two groups according to 

 their reactions. The first group, comprising the antisera for Chelonia 

 and Crocodilia, shows its maximum reactions with the sera of these two 

 sub-classes, and few and feeble reactions with the bloods of the Lacertilia 

 and Ophidia. This group also gave moderate results with the Avian 

 egg-albumins. These experiments confirm those done with the antisera 

 to Avian egg-albumins. 



The second group, comprising the antisera for the Lacertilia and 

 Ophidia, exerts its maximum effects on the Lacertilia and Ophidia. 

 Moderate reactions were obtained with Chelonian and Crocodilian sera. 

 With one exception no positive results were obtained with Avian egg- 

 albumins. The antiserum for Snake's egg-albumin, though behaving 

 otherwise like anti-snake serum, gave 36 "/o of moderately well-marked 

 reactions with Avian egg-albumins. 



All anti-reptilian sera reacted well with dilutions of Reptilian 

 egg-albumins, but gave negative results with Amphibian and Fish 

 egg-albumins, and Amphibian, Fish and Crustacean sera. 



The results of these experiments indicate a close relationship between 

 the Chelonia and Crocodilia and between the Lacertilia and Ophidia. 

 A distant relationship is shown between the Aves and the former group, 

 and a more distant one between them and the latter group. This last 

 is best seen in the tests with the antiserum to Snake's egg-albumin. 

 Anti-Chelonian and Crocodilian sera show very little affinity between 

 these animals and the Lacertilia and Ophidia, but antisera to the latter 

 indicate a relationship between them and the former. 



The following table summarises the results of tests with anti- 

 Reptilian sera. The percentages of the better marked reactions only 

 are given, and the experiments with anti-Lizard I {Uromastix spinipes) 

 and anti-Python are not included. 



23 



