[90 Gwynneth Buchanan: 



those of other members of the group. The granules in these two 

 forms closely resembled in appearance those figured by Burnett 

 <4) tor the horse. In L. dorsalis also, the eosinophil cells differed 

 from those of other batrachia examined, in averaging larger than 

 th<' (rue polymorph cells. Gruner, on the other hand, regards the 

 eosinophil cells as forming the important features of the blood of 

 amphibia. 



Polymorph cells of the true type are denied by Gruner, but he 

 notes forms containing a true polymorph nucleus, and faintly 

 basophil or amphophil cell substance, and these I found were 

 very distinct in most cases. In //. peronii these were represented 

 by forms with somewhat irregular nuclei, much pressed to the 

 side of the cell. 



In tadpoles the leucocytes were apparently all of the mononuc- 

 lear type, averaging 12.1//.-16.9/A ; while the spindle cells and 

 basophil reds containing large and less dense nuclei than the 

 orthochromatic were numerous, and in one form the true red 

 cells tended to become vacuolated. In such smears a differential 

 count was obviously impossible. 



Gruner regards the mononuclear as the primitive type of cell, 

 and, as such, they are to be expected in the more or less undif- 

 ferentiated blood of young animals. 



BATRACIAN CORPUSCLES. 



Percentage Counts of Leucocytes. 



Name Lymphocytes. 



Hyla aurea (young-) - 35.2-40.4 



„ (adult) - 51.2 



Lymnodynastes dorsalis - 6N.2 - 73 



