174 tMMtJNOLOGtY 



very low incidence for B and AB. The frequency of B varied 

 from 0.22 to 2.1 while AB varied from 0.0 to 0.22. Nigg (1926) has 

 also published data from this laboratory covering her investiga- 

 tions on the incidence of the various groups in 413 full-blooded 

 Hawaiians. She found 36.5 per cent were of group 0, 60.8 per 

 cent in group A, 2.2 per cent in group B and 0.5 per cent in 

 group AB. Nigg (1929), as well as Coca and Deibert (1923), 

 concludes that the highly civilized races are characterized by the 

 presence of isoagglutinogens, whereas the primitive peoples in all 

 parts of the world are characterized by the low incidence of iso- 

 agglutinogens. This conclusion would seem to be borne out by 

 the work of Goodner (1930) who found that of 223 pure Maya 

 Indians studied, 97.7 per cent belonged to group 0. Rife (1932) 

 likewise studied the incidence of blood groups among the Indians 

 in certain Maya areas of Central America. He found that 122 

 out of 124 belonged to group 0. Recently Matson and Schrader 

 (1933) reported that the Blackfeet and Blood tribes of American 

 Indians show a high percentage of group A and a relatively low 

 percentage of group 0. They found 76.5 per cent of 115 allegedly 

 full-blooded Blackfeet and 20 out of 24 full bloods of the Blood 

 tribe belonged to group A. Perhaps later work will explain these 

 exceptions. 



Distribution of Ag-glutinogen in Lower Animals.— The distri- 

 bution, among the lower animals, of substances either similar to or 

 identical with the agglutinogens found in human red cells has been 

 studied extensively by Landsteiner (1902), von Dungern and 



Table III 

 Agglutination Tests on Erythrocytes of Other Animals 



S H M H . < < 





S OS cii oi coeuooMa^OQ Q xE 

 Agglutinin solu- + +± +± +± + 000 + 000 + +±0 + 

 tion from hu- 

 man group II 

 serum 

 Agglutinin solu- Tr? + Tr. Tr? + 

 tion from hu- 

 man group III 

 serum 



Negative. Tr. Trace of agglutination. Degree of agglutination indicated 

 by ±, +, +±, etc. 



Prom Landsteiner and Miller: J. Exper. Med. 42: 869, 192.'5. 



