EXPLANATION OF THE PLATES. 13 



PLATE LIU 



Fig. 1. Vesiculifera affinis. — Fig. 2. Vesiculifera inequalis. 

 — Fig. 3. Vesiculifera cequalis. — Fig. 4. Vesiculifera 

 compressa. — Fig. 5. Vesiculifera spherica. — Fig. 6. Vesi- 

 culifera fasciata. — Fig. 7. Vesiculifera Rothii. — Fig. 8. 

 Vesiculifera alata. — Fig. 9. Vesiculifera flavesccns. — 

 Fig. 10. Vesiculifera Mullcri. — Figs. 11, 12. Vesicu- 

 lifera hexagona. — Fig. 13. Vesiculifera. — Fig. 14. Vesi- 

 culifera dubia. 



PLATE LIV. 



Fig. 1. Bulbochcete setigera in its ordinary condition. Figs. 

 2, 3, and 4. States of the same. 



PLATE LV. 



Cladophora crispata. 



PLATE LVI. 



Fig. 1. Cladophora glomerata. The species not magnified. 

 Fig. 2. The same magnified. 



PLATE LVII. 



Cladophora glomerata var. (pgagropila. 



PLATE LVIII. 

 Hydrodictyon utriculatum. 



PLATE LIX. 



Figs. 4, 5, 6. Lynghya zonata in its ordinary form. — Figs. 

 1, 2, 3. Lyngbya zonata car. — Fig. 7. Lynghya muralis. 



PLATE LX. 



Figs. 1, 2. Lyngbya floccosa. — Fig. 3. Lyngbya virescens. — 

 Fig. 4. Lyngbya punctalis. — Fig. 5. Lyngbya vermicular is 



