519 



In fig. 107 I have shown some of the specimens oi' Ihis spe- 

 cies contained in Lyngbye's Herbarium in Copenhagen. They are 

 rather different from the one mentioned ahove. The specimens 

 measure at the clavate-head where they are thickest about 30— 60 " 

 in breadth and near the base 8 — 14^. The head and the stem are 

 usually of about the same length, bul sometimes the head is a little 

 shorter, and somelimes 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 lo C. pusillum. 



The fruiting specimens in Lyngbye's Herbarium were gathered 



in July and August. 



Found hitherto in the Færoes by Lyngbye only, who writes with 

 reference lo it (Le): - »Habitat ad saxa littoris Færoensis in superiori 

 relluxus limite, ut ad Qualboe Suderoe, et ad Eldevig Osteroe, band fre- 

 quens«. In his herbarium there air specimens trom the abovc-men- 

 tioned localities. 



Order PHYLLOSIPHONACEAE. 

 OSTREOBIUM Born. et Flah. 



198. O. Queketti Born. et Flah. Sur quelques planles vivant 

 dans le test calcaire des mollusques, p. 15, pi. IX, ligs. 5 — 8. 



Found in the shells of, e. g. Modiola, Baccinum undatum, Soleu, 



Cardium, Serpula as also in Phymatolithon polgmorphum. Has been 



met with in the sublittoral zone at extreme low-waler mark, e. g. in a 



cave near Kvi vig 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 eoasls of the Færoes. 



Order BRYOPSIDACEAE. 

 BRYOPSIS Lam. 



109. B. plumosa (Huds.) Ag.; Br. Lyngbyei Fl. Dan., Tab. 1603; 

 Lyngb., Hydrophyt., p. 75. 



This alga was first found by Lyngbye, who mentions it in 

 Hydrophyt. under the name of Bryopsis Lyngbyei Fl. dan. 



1 Foslic, M., Nye havsalger (Troms6 Museums Aarshefter X. 1887). 



