BEHAVIOR OF ANURA TOWARD COLLOIDAL DYES 



17 



TABLE 5 

 Bufo lentiginosua 



Among eight (8) larvae killed on June 11, after one (1) day in 

 dye and one (1) day in tap water, dye granules were found to be 

 present in the epithelium of the pronephric tubules and in the 

 stellate cells of the liver of two (2) larvae. In the remaining six 

 (6) larvae no trace of dye was observed in the cytoplasm of any 

 cell in the body. 



Among six (6) larvae killed on June 12, after two days in dye 

 and one day in tap water, dye granules were found in the typical 

 tissues of five (5) individuals. In the remaining larva no dye 

 granules were observed. 



In the remaining twenty-one (21) larvae which were killed on 

 successive days, between June 13 and June 23, dye granules were 

 invariably found in the cytoplasm of certain typical cells. 



This experiment shows that considerable variation exists as 

 regards the rate at which the different individuals of this group 

 of larvae had developed prior to their immersion in dye on June 

 9. It also shows in the case of two of the more advanced larvae 

 that the storage of dye granules was accomplished within two 

 days, and that in all but one of the six individuals killed on June 

 12 (column IV, table 5) it was accomplished within three days. 



MEMOIR NO. 8 



