REVISED LIST OF MARINE ALG^. 1'23 



92. Fronds narrow, much divided, ultimate ramuli 



pectinate Plocamium 



Fronds palmately or dichotoniously divided ... 93 

 Fronds undivided, dull red, tetraspores and 



cystocarps immersed Dilsea 



98. Fronds very thin and delicate 94 



Fronds thickish, sub-cartilaginous or sub- 

 membranaceous 95 



94. Fronds rose-red or purplish, margins entire, 



usually more or less veined, tetraspores cruciate 



in scattered spots (sori) Nitophyllum 



Fronds dark red, ciliate, tetraspores zonate 



Bhodophyllis 



95. Tetraspores cruciate ... 96 



Tetraspores zonate Calliblepharls 



96. Fronds deep red broadly palmate or dichotom- 



ous, sometimes repeatedly laciniate with 

 narrow segments, margin proliferous Bhodymoiia 

 Fronds bright red, broadly palmate or dichotoni- 

 ously divided, spores immersed in minute 

 marginal ciha GallophylUs 



Explanation of Plates. 

 Plate II. 



Fig. 1. Two fronds of Catenella opuntia, shewing root- 

 branch, and cystocarps, terminal and lateral. 

 X 10. 



Fig. 2. Trichophoric apparatus with one trichophoric cell, 

 arising from cortical filament. X 450. 



Fig. 3. Trichophoric apparatus with two trichophoric 

 cells. X 450. 



Fig. 4. Terminal cell of the axial row from which arise the 

 filaments which bear the carpospores. X 450. 



