1915] ^. P- Blakcslcc and Ross Aiken Gortner 51 



The sera of Nos. 5 and 55 were tested with spores of two other 

 molds, — Absidia glauca and a species of the Mitcor raceinosus type. 

 There seemed to be a slight agglutination with both species. It is 

 possible that the rabbits tested had received so many spore injections 

 that their sera had largely lost their specificity and so were reactive 

 to spores of any species of this mold groiip. The resuks do not 

 seem to Warrant many definite conchisions in regard to the aggkitina- 

 tion reaction but suggest the need of further investigation. 



The resuks outHned in the preceding pages show that repeated 

 intravenous injections into rabbits of fungus spores fail to cause 

 the development in their blood of cytolytic substances capable of dis- 

 solving such spores, but apparently stimulate the formation of anti- 

 bodies that cause them to aggkitinate. 



LITERATURE CITED 



1. Blakeslee and Gortxer. On the occurrence of a toxin in juice 



expressed from the bread mold — Rhisopus nigricans. Bio- 

 CHEMiCAL Bulletin, 1913, ü, p. 54^. 



2. Gortner and Blakeslee. Observations on the toxin of Rhizopus 



nigricans. American Journal of PJiysiology, 1914, xxxiv, 



P- 353- 



3. Blakeslee. A possible means of identifying the sex of ( + ) and 



( — ) races in the mucors. Science, 1913 (n. s.), xxxvii, p. 880. 



4. Blakeslee. Lindner's roll-tube method of Separation cultures. 



Phytopathology, 1915. v. p. 68. 



5. Blakeslee and Gortner. See C. B. Davenport, " The Department 



of Experimental Evolution," Year Book of tJie Carnegie Institu- 

 tion of JVaslüngton, 1913, xii, p. 99. 



