represented in fig. 587 are the 
only ones collected in the Danish 
waters. As the structure and 
fructification of the species 
have been very little mentioned 
in the literature, only little 
can be adduced here on these 
matters. The specimens have 
a pink colour. The main 
shoots are lanceolate, the 
ee branches mostly opposite, com- 
Fig. 587. paratively narrow; the lower- 
Lomentaria rosea. Photo, °/, nat. size. most lanceolate, but most of 
them linear, 0.5—0.8 mm 
broad, sometimes a little broadened upwards. All the shoots are narrowed at 
the base. 
The anatomical structure of the frond seems to be similar to that of L. clavel- 
losa. The outer, small-celled cortical layer is 
subcontinuous, as in the above-named species, or 
interrupted, the small cells being only developed 
over the edges of the larger inner cells (fig. 588). 
The long medullary cell-rows running longi- 
tudinally within the cortical tissue were also 
distinguishable in the dried material. Hyaline 
hairs the tips of which were filled with proto- 
plasm were met with abundantly in the young 
pinne. 
Both specimens are fructiferous, containing ; NS DES. 
5 Ä © ë Lomentaria rosea. Surface view of a broad 
numerous sori of tetrasporangia in the pinnæ. frond. 350 : 1. 
The areas of the frond-wall containing the sori 
are concave, in accordance with the generic character. The tetrahedrically divided 
tetrasporangia were ripe in July. 
Sex organs and cystocarps seem to be entirely unknown in this species. It 
has been met with at the coasts of the Northern Atlantic (United States, Iceland, 
Færûôes, British Isles, Helgoland, Norway, Sweden), but from all localities only 
mentioned with tetrasporangia. 
Locality. Ke: South end of Groves Flak, 22.5 m, July 12th 1892. 
