RED ALG^. 233 



OxAex.— DUMONTIEM. 

 Genus.— HALOSACC JON* KUtz. 



HaLOSACCION RAMENTACEUMjt Ag. 



This is truly an Arctic plant, growing only in 

 northern waters, but there sufficiently plentiful. So 

 far as I know, it has not been found south of 

 Gloucester. Mrs. Davis finds it in deep tide pools, 

 from April to August, at Brace's Cove, Gloucester; 

 and Mrs. Bray on rocks, in tide pools, plentiful at 

 Bass Rocks, Gloucester. Harvey figures it as a plant 

 twelve to fourteen inches high, when full grown ; with 

 a pronounced leading stem as thick as a crow's quill 

 at the middle, much attenuated at' the base, and 

 somewhat so at the top ; clothed on all sides above 

 the middle with an abundance of branches, half as 

 large as the main stem, from one to three inches 

 long, mostly simple, but sometimes branched, and 

 always attenuated at base and apex. Both stem and 

 branches are hollow. 



My American plants are of a decided red color; 

 but I have Spitzbergen plants, from Prof. Kjell- 

 man, of Sweden, which are of a dull purple color, 



* Halosaccion ^ Sea-bag. 

 \ Ramentaceum ^= Branched. 



