Fig. 1. Chilodon (?) sp. Living, from a pond on the ice. August 1, 1894. It was just 

 brought under the microscope, but remained motionless, and there was no motion 

 of the cilia. The small corpuseles, a, in the protoplasm (ectoplasm) were in rapid 

 oscillation. The animal showed no change of form or structure as long as it 

 remained under observation. Magnilied about 1600 diameters (Zeiss obj. F, oc. 4, 

 with lengthened tube, cam. luc ). 



— 2. Chilodon sp. Living but motionless, from a pond on the ice. August 1, 1894. 



Probably same species as above; seen from the side. The small grains in the proto- 

 plasm were in rapid oscillation, m, Mouth, a, Anal opening. A vacuole is seen 

 in the posterior end on the dorsal side. The animal was much contracted and 

 probably died while being drawn. The great accumulation of food (?) on the 

 anterior dorsal side was sharply defined as if by an apparent membrane. This 

 accumulation, was externally surrounded by a layer of refractive globules. Ap- 

 parently dark spots, looking like grains or even like a reticulum (see Fig. 2), 

 were formed by refraction between the globules. These globules formed only 

 a layer in the exterior part of the formation, for when the microscope was 

 focussed on its central part a more homogeneous mass was seen, filling the interior, 

 whilst only a layer of globules was seen along the margin under the apparent 

 "membrane" (see Fig, dorsal side). This accumulation of globules changed after a 

 while. The stripes passing along the animal are possibly contractile fibres. They 

 also seemed to pass towards the place in the posterior end, which is presumably 

 the anal opening. A distinctly defined, tract or belt passed towards this place, 

 and looked as if it might be a canal. Magnified about 1600 diameters (Zeiss obj. F, 

 oc. 4, with lengthened tube, cam. Inc.). Length of animal was 0049 mm. 



— 3. Chilodon sp. Living but motionless, from a pond on the ice. Aug. 1, 1894. Seen 



from the right-hand side. The animal was possibly dying, as the body seemed 

 more contracted and rounder than was generally the case. In this individual there 

 were six greater and smaller accumulations of globules of the same kind as the 

 one in the previous figure. (I have also seen similar accumulations in other indi- 

 viduals in the same sample). Even here the layer of refractive globules sur- 

 rounded a more homogeneous mass. Some similar globules were seen dispersed 

 in the protoplasm of the animal as in Fig. 1, either single or united, some few 

 together. After a time some of the great accumulations of globules began to dis- 

 solve and the globules were dispersed singly in the protoplasm, in the same way 

 as usual (Fig. 1). Both in this and the previous specimen only a few oscillating 

 small grains were seen, but the refractive globules were in slow motion. In the 

 anterior end of the animal several longer cilia were seen situated near the margin 

 and on the ventral side. The right margin of the animal is seen as a dark streak 

 or belt along the figure, in Oral opening. 



Magnified about 1600 diameters (Zeiss F, 4, with lengthened tube, cam. luc). 

 Length of animal 0'054 mm. 



— 4. Chilodon sp. Living, from a pond on the ice, Aug. 1, 1894. Probably a species 



different from the above. This specimen was somewhat more oblong before it was 

 sketched. Its exterior form was much like the above, only that it had a more 

 pointed posterior end, and the oral opening was perhaps somewhat differently 

 situated, being directed more towards the anterior end (?). 



This individual is evidently somewhat contracted, perhaps in the act of forming 

 a cyst, as after a while some colourless mucuous substance was secreted from the 

 left side (on the right hand side of the drawing). At this period the cilia seemed 

 to have nearly disappeared. The refractive globules were in active oscillation. 

 Magnified about 760 diameters (Zeiss obj. F, oc. 2, cam. luc). Length of animal 

 0099 mm. 



— 5. Lacrymaria sp. Living but contracted and motionless. From a pond on the ice, 



July 24, 1894. Magnified about 760 diameters (Zeiss obj. F, oc 2, cam. luc). 



— 6, a & b. Lacrymaria sp. Living, but contracted and motionless, only cilia moving 



in Fig. 6, a. From a pond on the ice. July 28, 1891. 6, some time after a with 

 membrane burst, and oscillating grains spread towards all sides. Magnified 460 

 diameters (Zeiss obj. CC, oc. 5; cam. luc). 



— 7, a—d. Lacrymaria sp. Living, from a pond on the ice. July 28, 1894. The 



individual was observed during twelve hours from noon (Fig. 7 a) till near mid- 

 night (Fig. 7 d). The cilia were seen moving the whole time, but ceased to move 

 near midnight. Magnified 400 diameters (Zeiss obj. CC, oc. o; cam. luc). 



