Fig. 4, a and b magnified about 1200 diameters (Zeiss F, 4, freehand sketch) 

 and c 760 diameters (Zeiss obj. F, oc. 2. freehand sketch). 



The following organisms (Figs. 5—12) were all of them seen alive in prepa- 

 rations from the same water as Fig. 2, (a half percent solution of Sodium Chloride 

 made by Dr. Blessing). The figures are rough freehand sketches made with the 

 same magnifications (about 1400 diameters, Zeiss obj. F, oc. 2, long tube). 

 Fig. 5, a, b. A very refractive, almost structureless body, with no movement, a repre- 

 sents a later stage than b. The bud-like protuberance on the side was formed 

 during the observation. 



— 6, a, b. Very small bluish organism, fixed to the glass at the end opposite the 



cilium. b was later than a. 



— 7. Very small organism fixed to the glass in the pointed end (/). 



— 8. Came swimming, and fixed to the glass at /. This individual was much smaller 



than the following. 



Figs. 9—11, and 13. Represent the same individual, but the order is wrong. Fig. 13 a — c 

 was first drawn, and shows the individual as seen from different sides. The 

 other sketches of this individual was drawn in the following order: Fig. 11, d, 

 C, b, a, Fig. 10 and Fig. 9. The individual was the whole time fixed to the glass 

 at the pointed end (/). 



Length of body without cilium, 0007 mm. 



Fig. 12, a — c An individual which was at first fixed (Fig. 12 c and 6); but then loosened 

 itself and swam away (Fig. 12, a). 



