EXPLANATIONS AND REFERENCES, 



PLATE CCVI. 



Figures magnified 250 diameters. 



PAGE 



Fig. 1. OSCILLABIA SUBTILISSIMA, . . 309 



" 2. OSCILLABIA TENERRIMA, . . . 309 



" 3. OSCILLARIA AMPHIBIA, ... . 310 



" 4. OSCILLARIA ELEGANS, . . . . .310 



" 5. OSCILLARIA CRUENTA, . . . . . .312 



" 6. OSCILLARIA QRACILLIMA, . . . . .311 



" 7. OSCILLARIA LEPTOTRICHA, . . . . .311 



" 8. OSCILLARIA ANTLIARIA, ..... 310 



" 9. OSCILLARIA AERUGINEO-COERULEA, . . . 311 



" 10. OSCILLARIA VIOLACEA, ..... 311 



" 11-13. OSCILLARIA SUBFUSCA, ...... 312 



" 14. OSCILLARIA TENUIS, .... 313 



" 15. OSCILLARIA CORTIANA, ...... 313 



" 16. OSCILLARIA LIMOSA, ... . 313 



17. OSCILLABIA CHALYBEA, .... . 314 



18. OSCILLARIA ANGUINA, (suhsalsa), . . . 214 



19. OSCILLARIA NATANS, . ... 314 



20. OSCILLARIA NIGRA, . 315 



21. OSCILLARIA CHALYBEA, . . . 314 

 Figs. 22, 23. OSCILLARIA PERCDRSA, 315 



