PLATE 2 



EXPLANATION OF FIGURES 



3 Same. Fixation: Flemming's fluid. Staining: Safranin-picric acid. 1/15 

 imm., ocular 4. The two different aspects of the thyreoid cell, viz., the prin- 

 cipal and the colloidal cells, are distinctly shown. Some cells detached from 

 the epithelium are shown in the colloid. 



4 Same. Fi.xation: Flemming's fluid. Staining: Galeotti's method. 1/15 

 imm., ocular 4. Only a part of the section has been drawn, in order to demon- 

 strate the granules of secretion within the cell bodies. 



5 Same. Fixation: Formalin. Staining: Haematoxyjin and eosin. Objec- 

 tive, Zeiss BB, ocuiar 4. An island of thymus substance was found in the 

 thyreoid of this animal and is shown in this section. 



296 



