ALGsE 



Fig. 3. A RED A.'L.GA.TIocamiiim coccineum. 

 Portion of frond, natural size. 



Fig. 4. SOME GREEN 

 1. Conjugating filaments of Spirogyra. 2. Fragment of filament of Spirogyra. 

 3 and 4. Zygnema. 5 and 6. Cladophora. 5, x 4, others, x 50. 



23 



