526 
colonies, causing semiglobular swellings on the lamina. A trans¬ 
verse section of the lamina showed that the endophyte more or less 
destroys or ruptures the cells of 
Ihe epidermis, and I presume (I 
have not observed it) that the 
latter is finally entirely torn asun¬ 
der to allow the spores to escape. 
The cells are irregularly shaped, 
sometimes rounded, sometimes 
polygonus, and occur most fre¬ 
quently singly or a few together 
in short, ramified filaments, pro¬ 
duced by vegetative division. 
The vegetative cells are about 
5,4 y thick. The conidangia are 
somewhat larger, about twice as 
large, the greatest diameter being 
8 —10 y. The conidia are pro¬ 
duced abundantly in the coni¬ 
dangia and are about 1 /i broad. As I have had only spirit speci¬ 
mens of this plant for examination I am not prepared to say any¬ 
thing about the colour of its cell-contents. 
Found with conidangia in the beginning of May. 
This species has hitherto been found only as an endophyte in 
Chondrus crispus on Nolso: Ejde(!); and in Laminaria hyperborea on 
Str.: Thorshavn (!). 
Order OSCILLATORIACEAE. 
SPIRULINA Turpin. 
209. S. subsalsa Orsted. Beretning om en Exursion til Trin- 
delen, Kroyers Tidsskrift, 3. Bd., p. 566, 1842. 
forma 8 oceanica Gomont, Monographic des Oscillariees, p. 274. 
Found in rock-pools on fairly exposed coast. 
Str.: between Thorshavn and Hojvig (!). 
PHORMIDIUM Kiitz. 
210. PH. autumnale (Ag.) Gomont, emend. Johs. Schmidt 1 , Damn, 
blaagr. Alg., p. 68 (348). 
Grows near high-water mark, sometimes on rocks where fresh- 
1 Determ. Johs. Schmidt. 
Fig. 110. Hyella endophytica nov. spec.? In Laminaria 
hyperborea. 370:1. 
