21- 



film be counterstained with eosin, the fact that 

 the surrounding pale area is red cell will become 

 evident. 



Two forms may be seen : — 



(a) Normoblasts, i.e., nucleated red cells the 

 size of a red cell (Fig. 2a). 



(h) , Megaloblasts, i.e., nucleated red cells 

 much larger than a red cell (Fig. 2a). 



Normoblasts are the form usually seen. 

 Megaloblasts in excess are found in ' pernicious 

 anaemia.' 



2. Deformed and Small Red Cells may he seen. 

 — These are known as poikilocytes and microcytes. 

 They are common in severe anaemias, especially 

 pernicious anaemia. It is quite exceptional to 

 find deformed cells in blackwater fever. The red 

 cells are generally quite normal in shape, though 

 anaemic in varying degree. 



3. Abnormal Leucocytes. — Under certain con- 

 ditions, e.g., malaria, but especially myelogenous 

 leukaemia abnormal leucocyte forms are seen 

 which normally are only found in the marrow, i.e., 

 myelocytes. These belong to the large mono- 

 nuclear class, and may be of two kinds, either with 

 large eosinophil granules as in the eosinophil 

 cell, or fine neutrophil granules as in the poly- 

 morphonuclear leucocytes (Fig. 2b). If large 



