EXPLANATION OF THE PLATES. 17 



Spirillum minutissimum. — Fig. 9. Anabaina constricta. — 

 Fie;. 10. Nostoc cccrulcum. — Fig. 11. Monormia intricate. 



PLATE LXXVI. 



Fig. 1. Nostoc verrucosum. — Fig. 2. Nostoc foliaceum. — 

 Figs. 3 and 4. Nostoc pruiniforme. — Fig. 5. Nostoc sphce- 

 ricum. — Fig. 6. Aphanizomenon incurvum. — Fig. 7. Coc- 

 cochloris protuberans. — Fig. 8. Hcematococcus microsporia. 



— Fig. 9. Hcematococcus ?ni?iutissimus, in part. — Fig. 10. 

 Hcematococcus arenarius. — Fig. 11. Nostoc co37'uleum, 

 natural size. Fig. 12. Nostoc verrucosum? in young con- 

 dition. 



PLATE LXXVII. 



Fig. 1. Ulva calophylla. — Fig. 2. (a) Enteromorpha intesti- 

 nalis. (b) Transverse section of one of the filaments. — 

 Fig. 3. Hydrurus Ducluzelii. — Fig. 4. Ulva translucens. 



— Fig. 5. Botrydium granulatum. — Fig. 6. Coleochcete 

 scutata. 



PLATE LXXVIII. 



Fig. 1. (a) Coccochloris Mooreana of natural size, (b) Por- 

 tion of the same magnified. — Fig. 2. (a) (b) Coccochloris 

 hyalina. — Fig. 3. (a) (b) Coccochloris muscorum. — Fig. 4. (a) 

 (b) Coccochloris depressa. — Fig. 5. (a) (b) Coccochloris 

 hyalina ? — Fig. 6. (a) (b) Coccochloris rivularis. — Fig. 7. (a) 

 Coccochloris Grevillei. (b) Variety of the same. Fig. 8. 

 Variety (3 magnified. — Fig. 8. (a) Sorospora viresccns. — 

 Fig. 9. Hcematococcus theriacus. — Fig. 10. Tetraspora 

 lubrica. — Fig. 11. Tetraspora jlava. — Fig. 12. Ulva 

 crispa. — Fig. 13. Ulva bullosa. 



PLATE LXXIX. 

 Fig. 1. Sorospora montana. — Fig. 2. Hcematococcus sangui- 

 neus. — Fig. 3. Sorospora Ralfsii. 

 VOL. II, B 



