THE ALGAE OF BERMUDA. 79 



a relatively small portion, to be sure, of the living and floating brown 

 algae of the North Atlantic, which have given a certain district of it 

 the name of the " Sargasso Sea." Bouvier, 1907, p. 35, says " Ca et la, 

 parmi les Sargasses, on rencontre quelques fragments de Fucus nodo- 

 sus, arrachees certainement aux rivages des Canaries, de Mad^re ou 

 des Azores." To be sure, Sauvageau, 1907, p. 1084, points out that 

 the Fucus (Ascophi/Ilwn) has never been reported growing at the 

 Canaries, Madeira or the Azores; but Bouvier's erroneous assumption 

 does not invalidate his record of the occurrence of the plant as 

 described. Borgesen, 1914a, p. 14, note, says "Professor Gran has 

 most kindly communicated me that Ascophyllmn was found in the 

 northern part of the Sargasso Sea, and rather abundant." We think 

 it may be concluded that Ascophyllum, the original derivation 

 unknown, continues to live in a floating state among the Sargassum of 

 the Xorth Atlantic in active vegetation, and at least occasionally 

 fruiting. 



Fucus Linnaeus. 



F. VESicuLOSUS Linnaeus, 1763, p. 1636. A single battered but 

 unmistakable fragment was found washed ashore, Hervey. 



TuEBiNARiA Lamouroux. 



T. TRicosTATA Barton, 1891, p. 218, PI. LIV, fig. 3; P. B.-A., Xo. 

 1877. Gravelly Bay, Jan., Feb., March, April, Aug., Oct., Nov., 

 Dec, Hervey; Himgry Bay, July, Collins. Except a few plants 

 from near the entrance of Hungry Bay, the only locality we have 

 observed is at Gravelly Bay, where it grows abundantly in pools at 

 low water mark and sometimes higher up. T. trialata Kiitz., the 

 common species of the West Indies, we have not found, and though 

 the two species have much in common, we have found no plants 

 that would raise any doubt as to their distinctness. Quite young 

 plants were found in August; in these neither alae nor costae had yet 

 been formed. The mature plants, in December and January, are 

 from 10 to 15 cm. high; the root is rather slender, much branched, 

 2-4 cm. long; as the plants grow close together, the roots are inter- 

 mixed, but so loosely that individual plants can be separated without 

 difficulty. 



