94 



a slellate c'hioinaU)[)h()re with central pyrenoid lying in Hie upper part of the cell, 

 the strands radiating IVoni the central hody forming a more or less continuous pe- 

 ripheral layer. As Kylin (1906 fig. 8 G) represents the pyrenoid as being some- 

 times lateral, it may 

 he remarked that I 

 have always found it 

 central. 



The sporangia are 

 lateral on the filaments, 

 sessile or stalked, i. e. 

 situated on one-celled 

 branch lets and then 

 usually two on each 

 stalk-cell. The branch- 

 let may also be two- 

 celled , the primary 

 stalk-cell bearing, be- 

 sides a terminal spor- 

 angium, a lateral stalk- 

 cell with a sporan- 

 gium. Usually only 

 one sporangium or 

 sporangium -bearing 

 branchlet is situated 

 on each cell in the 

 filaments. The spor- 

 angia are ovate to 

 oblong, (8,5 ) 9,5 10,5 

 (-13);/ long, (4 )6-7 

 (~9) fji broad. 



Many plants bear 

 exclusively sporangia, 

 but by searching, spe- 

 cimens bearing also or 

 exclusively sex-organs 

 are easily found, at all 

 events in the Danish 

 waters. In describing 

 i-ig. V] the sexual organs I 



Clianlrunsia liallaniUu f/.. li/pica. A. w ith sexual organs ;iiid sporangia. H85:l. IS, willi refer alsO tO the olants 

 s])oiaiifjia, :58.):1. ('. \\ ilh c\ slocarps. 3(M):1. D. fragment ol' plant liearing l)ranchlels 



with anlheridia and sporangia, 020: 1. 7i. fragment ol' plant bearing a branchlet wilh l^eloilging tO the Var. 



carpogoniuni and aniheridia. and an ein|)tied sporangium. (120 :1. .1 and C Irom All', [jyguior The antllCridia 



B. D. E from LC. 



