LIST OF ILLUSTRATIONS XXV11 



FIG. PAGE. 



28. Amoeboid movements excited in a leucocyte by the action of 



atropine. Low power 135 



29. Exaggerated amceboid movements in leucocytes which have their 



granules stained. The movements were excited by atropine 

 sulphate 135 



30. Excited leucocytes extruding their pseudopodia between red cells. 137 



31. Excitation of amceboid movements in a4ymphocyte by the action 



of atropine. No stain 137 



32. Excitation of amoeboid movements in a lymphocyte which has its 



granules stained 143 



33. Extreme excitation of amceboid movements in a lymphocyte. 



No stain 143 



34. Excitation of two leucocytes by the action of choline. Low 



power. No stain . 151 



35. Excitation of a lymphocyte by the action of choline. No stain . 151 



36. Excitation of amceboid movements in a leucocyte by the action of 



cadaverine. No stain .153 



37. A leucocyte excited by morphine. The cell's granules are stained . 153 



38. Leucocytes excited by pyridine. No stain 173 



39. A lymphocyte which has absorbed stain and atropine discarding 



its granules (flagellation) 173 



40. A resting lymphocyte. Note the deeply stained masses of gran- 



ules in the cytoplasm, which is bulged out in places. The large 

 transparent nucleus and the stained ring-shaped nucleolus can 

 also be seen . 189 



41. A resting lymphocyte. The Altmann's granules in the cytoplasm 



are stained 189 



42. A resting lymphocyte. The cytoplasm, the granules, the nucleus, 



and the nucleolus can be distinguished 191 



43. The earliest stage of mitosis. The nucleolus has divided into two 



rings 191 



44. Early mitosis in a lymphocyte. Looking down through the spindle 



(polar aspect) . The nucleolus has divided into two centrosomes, 

 each of which is ring-shaped. The spindle is surrounded by a 

 belt of chromatin granules 193 



45. Mitosis in a lymphocyte. Profile aspect. The two ring-shaped 



centrosomes can just be seen towards the poles. The granules 

 are becoming formed into chromosomes 193 



46. Foreshortened appearance of a mitotic figure in a lymphocyte. 



The position of one nucleolus-centrosome at the pole of the figure " 

 is well shown 195 



47. Profile aspect of mitosis in a lymphocyte. The relative positions 



of the centrosomes and chromosomes can be seen ...... 195 



48. Profile aspect of mitosis. The belt of chromatin is formed round 



the waist of the cell . .197 



