F. Børgesen: Rhodophyceæ of the Danish W. Indies. 



93 



diameter of the central tissue being about 600 [x. The cells which 

 bear the assimilating filaments are well developed, quadrangular 

 (sometimes triangular), about 45 ^x broad. 



The short assimilating filaments usually consist of three some- 

 times of two cells only. The basal cell is large, oval, about 65 ^ 

 long and 45 fi broad. The diameter of the uppermost small cells 

 varies between 16 and 25 fx. The sizes Kjellman gives for these 

 cells are somewhat greater 

 but in the specimen of the 

 original material which I 

 have examined I found the 

 size of these cells agreeing 

 very well with that of mine. 

 In the long assimilating fila- 

 ments the basal cells are 

 of a similar size to those 

 of the short filaments, the 

 filament itself is about 16/^ 

 thick and consists of cy- 

 hndric thick-walled cells 

 about 30 /i long. 



This species was found 

 growing in shallow water and 

 in an exposed locality at Long 

 Reaf near Christiansted, St. 

 Croix. Furthermore a speci- 

 men washed ashore at Sandy 

 Point, St. Croix, has been 

 sent to me by Dr. Hambur- 

 ger. ØRSTED does not indi- 

 cate the locality where he found 

 his specimens. 



Mile. Vickers mentions 

 this species from Barbados in 



her list and I have specimens of it from Jamaica (Kingston) where it was 

 found by Mr. O. Hansen Ganneskov. 



Geogr. Distrib. West Indies. 



Fig. 98. Galaxaura flagellifor?nis Kjellm. 

 Tranverse section of a young thallus with 

 mostly long assimilating filaments in diffe- 

 rent stages of development. (About 150:1). 



3. Galaxaura flagelliformis Kjellm. 

 Kjellman, F. R., Om Floridé-slagtet Galaxaura, p. 47. 



This species was based by Kjellmax upon specimens from 

 Key West, Florida, collected by Bailey and preserved in Herb. 

 Areschoug in Stockholm. 



