519 
In fig. 107 I have shown some of the specimens of this spe¬ 
cies contained in Lyngbye’s Herbarium in Copenhagen. They are 
rather different from the one mentioned above. The specimens 
measure at the clavate-head where they are thickest about 30—60 y 
in breadth and near the base 8—14 y. The head and the stem are 
usually of about the same length, but sometimes the head is a little 
shorter, and sometimes somewhat longer than the stem, as in the 
specimens which I have figured. 
According to my opinion the plant which was first determined 
by Foslie (1. c.) as C. pusillum, and which he afterwards described 
as a distinct species C. cylindraceum Fosl. 1 , should be regarded as 
a form belonging to C. pusillum. 
The fruiting specimens in Lyngbye’s Herbarium were gathered 
in July and August. 
Found hitherto in the Faeroes by Lyngbye only, who writes with 
reference to it (1. c.)j — »Habitat ad saxa littoris Fseroensis in superiori 
refluxus limite, ut ad Qualboe Suderoe, et ad Eldevig Osteroe, haud fre- 
quens«. In his herbarium there are specimens from the above-men¬ 
tioned localities. 
Order PHYLLOSIPHONACEAE. 
OSTREOBIUM Born, et Flah. 
198. 0. Queketti Born, et Flah. Sur quelques plantes vivant 
dans le test calcaire des mollusques, p. 15, pi. IX, figs. 5—8. 
Found in the shells of, e. g. Modiola, Buccimun undatum, Solen , 
Cardium, Serpula as also in Phymatolithon polymorphum. Has been 
met with in the sublittoral zone at extreme low-water mark, e. g. in a 
cave near Kvivig where it was found in Phymatolithon polymor¬ 
phum. It occurs down to a depth of about 25 fathoms. 
It has been found in many localities and is beyond doubt common 
along the coasts of the Fseroes. 
Order BRYOPSIDACEAE. 
BRYOPSIS Lam. 
199. B. plumosa (Huds.) Ag.; Br. Lyngbyei FI. Dan., Tab. 1603; 
Lyngb., Hydropliyt., p. 75. 
This alga was first found by Lyngbye, who mentions it in 
Hydropliyt. under the name of Bryopsis Lyngbyei FI. dan. 
Foslie, M., Nye havsalger (Tromso Museums Aarshefter X. 1887). 
