313 



..■'M% 



*«'<'■/■ 



Fiff. 1. 



\5^:%^ 



Fig. 3. 



Fig. 4. 



Fig. 6. 



Fig. 5. Fig. 7. 



The figures are all drawn with the same magnification. 



Fig. 8. 



Figs. 1—5, large mononuclear and polymorphonuclear leukocytes from the 

 blood of Amblystoma. 



Fig. 6, spindle cell of Amblystoma. 



Fig. 7, nucleus of an erythrocyte of Amblystoma. 



Fig. 8, nucleus of an erythrocyte of the garter snake. 



