415 
Loc alities. Li: Under Lischoj, N.W. point of Fur, 1—2 m, apparently growing on diatomite (dan. 
Molér) with ripe sporangia in July; Amtoft reef, from a slight depth to 4 meters (unknown in which depth 
t has been growing). Sand and clay is retained between the erect filaments, With cystocarps in August. 
3. Polysiphonia elongata (Huds.) Harvey. 
Harvey in Hooker, Brit. Flora 1833 p. 333; Harvey Phye. Brit. IU 1851 pl. 292, 293; Kützing, Phycol. 
gen. 1843 Taf. 50 V; Tab. phyc. 14, 1864 Taf. 4; J. Agardh, 1863, p. 1004; Kny 1873, p. 107, Taf. II 
Fig. 5; Kolderup Rosenvinge 1884, p. 24, 1903, p. 405; Falkenberg, 1901, p. 126, Taf. 21, Fig. 6—9; 
Kylin, 1907, p. 144; L. Batten 1923 pp. 279, 297. 
Conferva elongata Hudson, F1. angl. II, 1778, p. 599. 
Ceramium elongatum Lyngbye, Hydr. 1819, p. 117. 
Ceramium brachygonium Lyngbye Hydr. p. 118, Tab. 36 C. 
Hutchinsia strictoides Lyngbye Hydr. p. 114, Tab. 35 D. 
Hutchinsia elongata Flora Danica tab. 1836, 1825. 
Polysiphonia strictoides Kützing Tab. phyc. 14, 1864, Tab. 10. 
a, typica. 
8, Schuebelerii (Foslie) nob. (Plate V fig. 2). 
Comp. Borgesen and Jonsson, The distribut. of the Mar. Alg. of the Arctic Sea etc. Appendix to the 
Botany of the Færåes. 1908 p. XII. 
P. Schuebelerii Foslie, Nye arct. havalg., Christiania Vidensk. Selsk. Forh. 1881 Nr. 14 p. 3, tab. I fig. 1—3. 
Kolderup Rosenvinge, Gronl. Havalg. 1883 p. 798, pl. I figs. 1—2. 
y, baltica nob. (Plate V fig. 3). 
The morphology of the frond has been described by Kny and FALKENBERG. 
The trichoblasts are arranged in a regular spiral turning to the left, each joint 
bearing a trichoblast with the exception of the first 5 or 4, rarely of a greater number 
of joints in the branches, which bear no lateral organs. The 
divergence of the trichoblasts in the spiral is a little greater than 
la. The cells of the trichoblasts contain one nucleus. In f. baltica 
the trichoblasts are simple or very feebly branched and usually 
contain well developed rose-coloured chromatophores. The branches 
appear in the places of trichoblasts in the spiral, and are usually 
separated by 5 joints, more rarely by 4 or 6. Upwards the branches 
often become rarer, in particular in the tetrasporiferous and the  pyspnonta elongata 
antheridia-bearing shoots, which in their upper parts are entirely £ Schuebelerü. Tip of 
branchless. The branches usually appear singly; branches on two ee ma a oak 
consecutive joints may, however, sometimes occur. segment has been cul 
Adventitious shoots from the basal cells of the fallen off an hir 
trichoblasts (secondary axillary shoots) appear not rarely, in 
particular on the lower part of the shoots. In specimens of f. baltica from Flens- 
borg Fjord adventitious shoots appeared abundantly and early, before the tricho- 
blast had been shed (fig. 364). The adventitious branches, however, usually reach 
only a slight degree of development in the first season. On the other hand, 
=q 
do 
