EXPLANATION OF FIGURES IN PLATES 



All the drawings have been made by means of Abbe's drawing apparatus. 

 Zeiss' compensation oculars, 6, 8, 12, and IS and homogenous oil-immersion 

 objective 2 mm., were used. Abbreviations in the explanations of plates are as 

 follows : 



G., Giemsa-staining, followed by acetone dehydration, by mounting in cedar 

 oil; H., Heidenhaiii's iron-hematoxylin staining; P.F., pressed mechanically and 

 stained after Fontana's method; »S'., section preparation; Sm., smear preparation. 



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