PLATE XXIV. 



A. CoDiuM, page 193. 



Fig. 1, C. tomeniosum ; the natural size. 2, filaments 

 from the same, in frnit ; magnified. 



B. Bryopsis, page 194. 



Fig. 1, B. plumosa, the natural size. 2, part of a 

 branch ; magnijied. 



C. Vaucheria, page 195. 



Fig. 1, V. suhmarina ; the natural size. 2, portion of 

 a fertile filament; magnijied. 



D. Cladophora, page 198. 



Fig. 1, C. falcata ; the natural size. 2, small branch 

 with secnnd, falcate ramuli ; magnijied. 3, ramulus, 

 more highly magnijied. 



E. Conferva, page 207. 



Fig. 1, C. tortuosa; the natural size. 2, portion of a 

 filament ; magnijied. 



F. Rhizoclonium, page 206. 



Fig. 1, R. riparium; the appearance to the naked eye. 

 2, portion of a filament, magnijied. 



