94 
a stellate chromatophore with central pyrenoid lying in the upper part of the cell, 
the strands radiating from the central body forming a more or less continuous pe- 
ripheral layer. As Kyrın (1906 fig. 8 G) represents Ihe pyrenoid as being some- 
times lateral, it may 
be remarked that I 
have always found il 
central. 
The sporangia are 
-lateralonthe filaments, 
sessile or stalked, i. e, 
situated on one-celled 
branchlets 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) » 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 
Fig. 21. the sexual organs I 
Chantransia hallandia a, typica, A, wasn sexual organs ame! sporangia, 385: 1. B, with yefer also to the plants 
sporangia, 385:1. C, with cystocarps, 300:1. D, fragment of plant bearing branchlets 
with antheridia and sporangia, 620:1. E, fragment of plant bearing a branchlet with belonging lo the var. 
carpogonium and antheridia, and an emptied sporangium. 620:1. A and C from AH", Bike Ge 
B, D, E from LC. brevior. The antheridia 
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