Fig. 1. Lacrymaria sp. Living individual, from a lump of alga? floating in a channel 

 between the ice-floes. July 20, 1894. Transparent and colourless. Magnified about 

 760 diameters (Zeiss obj. F, oc. 2; cam. luc). 



— 2. Lacrymaria sp. Same individual as Fig. 1; while moving. Less magnified (Zeiss 



obj. F, oc. 2; freehand sketch). 



— 3. Lacrymaria sp. Rough sketch of moving individual; from same place as above. 



July 20, 1894. The globules of the cell-contents are in the figure only indicated 

 in the anterior part (Zeiss obj. F, oc. 2; freehand). 



— 4 and 5. Lacrymaria sp. An individual of the same species as Fig. 3, and pro- 



bably also, as Fig. 1, but with the spiral-furrows very distinct. Killed with Osmic 

 Acid, stained with Borax-Carmine, and transferred to Canada Balsam. From a pond 

 on the ice. July 24, 1894. In Fig. 4 the specimen is seen somewhat obliquely; 

 the anterior end being lifted slightly upwards. Fig. 5 represents the same speci- 

 men turned over on one side and at full length. Magnified about 1150 diameters 

 (Zeiss Horn. Im. '/i8> oc - 2; cam. luc). 



— 6 and 7. Lacrymaria sp. An individual killed with Osmic Acid (Fig. 7) and after- 



wards stained with Borax-Carmine (Fig. 6). From a pond on the ice. July 24, 

 1894. Magnified 760 diameters (Zeiss obj. F, oc. 2; cam. luc). 



— 8. Lacrymaria sp. From the same sample as the previous individual. Killed with 



Chromo-Aceto-Osmic Acid. 



— 9. Lacrymaria sp. From the same samples as Figs. 1 and 3. July 20, 1894. Killed 



with Osmic Acid. Magnified about 760 diameters (Zeiss obj. F, oc. 2; cam. luc). 



— 10. Lacrymaria sp. Living specimen, in contracted, motionless state. From a pond 



on the ice. July 28, 1894. (Zeiss obj. F, oc. 2; freehand sketch). 



— 11 and 12. Lacrymaria sp. Living specimen, of the same species as above, in con- 



tracted motionless state. From a pond on the ice. July 28, 1894. Fig. 12 was 

 drawn 6 hours later than Fig. 11; the individual was then possibly dead; there 

 was no movement of the cilia, and a great many of them had disappeared. Mag- 

 nified 460 diameters (Zeiss obj. CC, oc. 5; cam. luc). 



— 13 and 14. Lacrymaria sp. Living individual, from a pond on the ice. Aug. 2, 1894. 



Magnified about 500 diameters. Length of animal in Fig. 13 0'044 mm. Freehand 

 sketches; Fig. 13 drawn after Fig. 14. 



