212 ILUNOIS BIOLOGICAL MONOGRAPHS [450 



EXPLANATION OF PLATE 

 Figs. 1 to 5. Leptotkeca agUis. 



Fig. 1. A typical trophozoite in vivo. After Thfilohan (1895, Fig. 29); X750. * 

 Fig. 2. A young form. After Th^lohan (1895, Fig. 31). X750. 

 Fig. 3. A trophozoite in motion. After Doflein (1898, Fig. 5). 

 Fig. 4. A trophozoite in contracted condition. After Doflein (1898, Fig. 7). 

 Fig. 5. A fresh spore. After Th61ohan (1895, Fig. 30). X1500. 

 Fig. 6. A fresh mature spore of Leptotkeca dongata. After Thdohan (1895, Fig. 38). 



X1500. 

 Fig. 7. A fresh mature spore of Z^/><o//(«ca ^orra. After Thdohan (1895, Fig, 25). X1500. 

 Fig. 8. A fresh spore of Leptotkeca perlata. After Balbiani (1884, Fig. 40). 

 Fig. 9. A spon oi Leptotkeca macros pora. After Auerbach (1909, Fig. 2a). X1350. 

 Fig. 10. A spore of Leptotkeca informis, preserved in formol. After Auerbach (1910b, Fig. 



la). X about 2000. 

 Fig. 11. A spore of Leptotkeca longipes, preserved in formol. After Auerbach (1910b, Fig. 



Id). X about 2200. 

 Fig. 12. AiresiispoitoiLeptotkecafusiformis. After Davis (1917, Fig. 1). X1500. 

 Fig. 13. Airesh spore ol Leptotkeca scissura. After Davis (1917, Fig. 8). X1500. 

 Fig. 14. A fresh spore of Leptotkeca lohosa. After Davis (1917, Fig. 11). X1500. 

 Fig. 15. A fresh spore of Leptotkeca glomerosa. After Davis (1917, Fig. 13). X1500. 

 Fig. 16, A trophozoite of Leptotkeca sp. After Awerinzew (1908, PI. 2, Fig, 14). 1/12 



and comp, oc, 12. 

 Fig. 17. Another trophozoite of the same. After Awerinzew (1908, PL 2, Fig. 17). 1/12 



and comp. oc, 12, 

 Figs. 18 to 20. Ceratomyxa arcuata. After Th^lohan (1895). 

 Figs. 18 and 19. Typical young form. After Thflohan (1895, Figs. 16 and 17). 

 Fig. 20. A trophozoite with two spores. After Thelohan (1895, Fig. 18). 



