MAEINE ALG^ OF THE ' SEALAEK ' EXPEDITIOTs\ 113 



of the algse from Praslin seem to indicate tliat they belong to G. lAehmmini rather 

 than to G. collahens from Australia, described by Kjellman as " solitaria, erecta et 

 robusta." The plants from Praslin are short, intricate, and grow close together ; the 

 short cortical filaments consist, as a rule, of four cells only, and of these the lower 

 one is by far the largest. 



2. Galaxauha hawaiiana, Butt. (Plate 13. fig. 25.) 



Butters, " Liagura and Galaxaura," Minnesota Bot. Studies, vol. iv. part 2, 1911, p. 176. 



Aldabra, reef, outside Passi Honakan. 



Distribution. Pacific Ocean, Prench Prigate Shoal, Bird Island. 



The alo-se from Aldabra are very much like Galaxaura hawaiiana, Butt., and the 

 differences between the description of G. hawaiiana (I have seen no type specimen) and 

 the alg£e from Aldabra are not, I think, sufficiently great to warrant the description of a 

 new species. The aJg^e from Aldabra are a little longer (they have a length of 7 cm., 



breadth of 2 mm.), and the long internodes are not tapering, but rounded or 



a 



truncate. The frond is slightly but distinctly annulate, and in the dried specimens of a 

 remarkable dark brown-red colour ; the anatomical structure is like that of G. hawaiiana, 

 Butt. Butters records G. hawaiiana from depths of 14-16 and 26 fathoms; the 

 specimens from Aldabra were found at the outside of Passi Honakan. This difference 

 of locality may perhaps account for the small differences observable in the two plants. 

 I have given a figure of the Aldabra plant, which shows very well the long terminal 



internodes. 



3. Galaxauha fastigiata, Decne. 



Decalsne, Sur les Corallines, 1843, p. 16. 



Kjellman, " Floride Slagtet Galaxaura," in Kongl. Sv. Vet.-Akad. Haudl. Bd. xxxiii. 1900, p. 64. 



Terne Mahe ; dry specimen. 



Saya de Malha ; fragment only. 



Distribution. Pacific Ocean; Philippines; Malay Archipelago. 



4. Galaxatjea vepeecula, Kjellm. 



Kjellman, '' Florida Slagtet GaJaxaura;' in Kongl. S v. Vet.-Akad. Ilaudl. Bd. xxxiii. 1900, p. 80 



Amirante, 20-25 fms. ; in alcohol. 

 IHstribution. Indian Ocean, Madagascar. 



6. Galaxatjea obttjsata (Sol.), Lamx. 



I 



Solander in Ellis, Zoophytes, 1786, p. 113. 

 Lamouroux, Polypiers coralligenes, 1816, p. 262. 

 Agaruh, Epicrisis systematis Eloridearum, 1876, p. 525 



Saya de Malha, 26 fms. ; only a small specimen 



Disti 



Japan. 



Warm Atlantic, West Indies; Pacific Ocean, Loo Choo Island 



SECOND SERIES. — BOTANY, VOL. VIII. 



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