EXPLANATION OP THE PLATES. 17 



Spirillum minutissimum. Fig. 9. Anabaina constricta. 

 Fig. 10. Nostoc cceruleum. Fig. 11. Monormia intricata. 



PLATE LXXVL 



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. Cbc- 

 cochloris protuberans. Fig. 8. Hcematococcus microsporus. 

 Fig. 9. Hcematococcus minutissimus, in part. Fig. 10. 

 Hcematococcus arenarius. Fig. 11. Nostoc cceruleum, 

 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 virescens. 

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

 lubrica. Fig. 11. Tetraspora flava. 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 



