F. Borgesen: Rodophyceæ of the Danish W. Indies. 



107 



Zanardinia marginata J. Ag., Spec. Alg., vol. Ill, p. 534. 

 Brachycladia marginata Schmitz, System. Übersicht d. bisher bekannt. 

 Gatt, der Florideen (Flora, 47, 1889, p. 438). 



This species was founded 

 upon a specimen collected at 

 the Bahama Islands. The de- 

 scription of Kjellman on the 

 other hand is based upon a 

 specimen in Areschoug's Her- 

 barium in Stockholm and on 

 which he remarks that it was 

 collected at the coast of South 

 America at Bahia (?). But 

 among the material of Ga- 

 laxaiira in Herb. Areschoug 

 which I have seen, no such a 

 specimen is present ; on the other 



Fig. 115. Galaxaura marginata (Solan- 

 der). Part of a plant (About 1,5 : 1). 



hand one is found collected 

 by LiEBMAN at Havana and 

 determined by Kjellman 

 as G. marginata. Most prob- 

 ably this is the specimen he 

 refers to. 



Kjellman points out 

 that the specimens examined 

 by him agree well with the 

 figure of SoLANDER, and as 

 both plants also have been 

 collected in nearly the same 

 area he considers himself en- 

 titled to refer Areschoug's 

 specimens to Solander's 

 species. 



The rather numerous 

 specimens (Fig 115) I have 

 collected seem in all essen- 

 tials to agree with the de- 

 scription of Kjellman. They 

 differ from it in one respect, however, the assimilating peri- 

 pheral cells ending commonly, but not always, in a short api- 

 culus (Fig. 116), in a similar way to that described by Kjellman 

 for his species, Galaxaura apiculata from Japan. This short api- 



Fig. 116. Galaxaura marginata (Sol.). 



Transverse section of the perif eric tissue of 



a form with apiculated assimilating cells. 



(About 250 : 1). 



