PLATE I. 



Mesenchytrceus harrimani sp. nov. 



FIG. i. Cyanophil lymphocyte, with granules surrounded by a narrow 

 zone of eosinophil cytoplasm. 



2. Cyanophil lymphocyte of the same nature as the foregoing, but 

 of a broader form. 



3. Cyanophil lymphocytes in which eosinophil granules are being 

 formed in the zone surrounding the cyanophil granules. 



4. Eosinophil lymphocyte with foamy cytoplasm. In some of these 

 minute chambers eosinophil granules are being formed. 



5. Eosinophil lymphocytes in which the formation of granules has 

 progressed farther than in the cell represented in the last figure. 



6. Eosinophil lymphocyte in which the eosinophil granules have 

 reached their final size. In this stage the granules are thrown out 

 into the cytoplasm. 



Mesenchytrceus unalaskce sp. nov. 



7. Eosinophil lymphocyte with foamy cytoplasm and eosinophil 

 granules. 



Mesenchytrceus grandis sp. nov. 



8. Cyanophil lymphocytes with the granules surrounded by a narrow 

 zone of eosinophil secretion. 



9. 10. Eosinophil lymphocytes. 



Mesenchytrceus setchelli sp. nov. 



11. Cyanophil lymphocyte. 



Mesenchytrceus eastwoodi sp. nov. 



12. Cyanophil lymphocyte. 



Mesenchytrceus pedatus sp. nov. 



13. 14. Cyanophil lymphocytes. 



Mesenchytrceus fontinalis sp. nov. 



15. Cyanophil lymphocyte. 



Mesenchytrceus kincaidi sp. nov. 



16, 17. Lymphocytes with foamy cytoplasm and without granulations. 



The margin shows cytoplasmic projections. 



Mesenchytrceus fuscus inermis subsp. nov. 



18. Cyanophil lymphocyte with radiate margin. 



Enchytrceus alaskce sp. nov. 



19. Eosinophil lymphocyte with numerous globular granulations. 



(128) 



