PLATE XIII. 



A. CHRYSYMENIA, page 99. 



Fig, 1, C. clavellosa, a small plant ; the natural size. 

 2, rainulus with imbedded tetraspores. 3, a tetra- 

 spore. 4, small branch, with ceramidia on its ra- 

 muli. 5, a ceramidium ; all magnified. 



B. CHYLOCLADIA, page 100. 



Fig. 1, C. kaliformis, a small plant ; the natural size. 

 2, apex, bearing ceramidia on the ramuli. 3, a cera- 

 midium. 4, tufted spores from the same. 5, apex 

 having tetraspores imbedded in the ramuli. 6, a 

 tetraspore ; all magnified. 



C. CORALLINA, page 105. 



Fig. 1, C. officinalis ; the natural size. 2, small part 

 of the frond, with terminal ceramidia. 3, a cera- 

 midium cut open. 4, a tetraspore. 5, small part of 

 the frond, after the lime has been removed ; magnified. 



D. JANIA, page 107. 



Fig. 1 . Tufts of J. rubens, the natural size. 2, a fer- 

 tile branch of the same. 3, ceramidium. 4, tetra- 

 spores, from the same. 5, part of an articulation of 

 the frond, after the lime has been removed; magnified. 



