The cells are of rather variable length, usually about as long as broad or 
somewhat longer, up to 3 times as long, in the last case usually barrel-shaped. 
On the other hand they may be sometimes much shorter than broad, up to 3 to 
4 times as broad as long (fig. 15 B); they are then proportionally broad, 9—12,5 y, 
being otherwise 6,5—10 broad. The cells contain, as is well known, a star-shaped 
chromatophore with a central pyrenoid.. The colour is lilac; in very light localities, 
however, it is faded, feebly yellowish or grayish. Such a pale yellowish specimen 
was placed in a glass-vessel filled with sea-water in a room with subdued light for 
some days. After 24 hours the colour was already somewhat reddish, and after 
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Fig. 15. Fig. 16. 
Goniotrichum elegans. A, portion of the older part of a frond with young Goniotrichum elegans. After a living 
branch below the older. — Band C show the normal ramification; the plant from Sallingsund. 290 :1. 
cells partly very short. — D and E, the cells displaced, giving up the uni- 
serial arrangement; the cuticle in E very thick. — B and C from the Skage- 
rak, the others from Sallingsund. — All figures 190 :1. 
3 days the plant had a decided lilac colour. When dying the cells assume a light 
blue-green colour. 
Concerning the reproduction I have made no observations. According to 
SCHMITZ (1894 p. 718 (14) and 1896 p. 314), monospores are produced by the or- 
dinary cells, the cell-content being condensed and liberated as a naked spore. I 
have not seen this spore-formation, but I have sometimes remarked, that single 
cells were wanting in the filaments, probably because they had been set free in 
the form of spores. 
The species has hitherto been found in the Skagerak, Limfjord and Kattegat, 
