93 



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

 bear the assimilating filaments are well developed, quadrangular 

 (sometimes triangular), about 45 p broad. 



The short assimilating filaments usually consist of three some- 

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

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

 varies between 16 and 25 //. 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- 

 lindric thick-walled cells 

 about 30 // 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. ORSTED 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 flagelliformis 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 Floride-slagtet Galaxaura, p. 47. 



This species was based by KJELLMAN upon specimens from 

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

 ARESCHOUG in Stockholm. 



