WEBER-VAN BOSSE—MARINE ALG 277 
of the algze from Praslin seem to indicate that they belong to G. Liebmanni rather 
than to G. collabens 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. GALAXAURA HAWATIANA, Butt. (Plate 17. fig. 25.) 
Butters, “ Liagora and Galaxaura,” Minnesota Bot. Studies, vol. iv. part 2, 1911, p. 176. 
Aldabra, reef, outside Passe Houareau. 
Distribution. Pacific Ocean, French Frigate Shoal, Bird Island. 
The alge from Aldabra are very much like Galaxaura hawaiiana, Butt., and the 
differences between the description of G. hawatiana (I have seen no type specimen) and 
the alge from Aldabra are not, I think, sufficiently great to warrant the description of a 
new species. The algze from Aldabra are a little longer (they have a length of 7 cm., 
a breadth of 2 mm.), and the long internodes are not tapering, but rounded or 
truncate. The frond is slightly but distinetly 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 Passe Houareau. 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. GALAXAURA FASTIGIATA, Decne. 
Decaisne, Sur les Corallines, 1842, p. 16. 
Kjellman, “ Floridé Sligtet Galavaura,” in Kongl. Sy. Vet.-Akad. Hand]. Bd. xxxiii. 1900, p- 64. 
Mahé, Cap Terné ; dry specimen. 
Saya de Malha, 26 fms. or over; fragment only. 
Distribution. Pacific Ocean; Philippines ; Malay Archipelago. 
4. GALAXAURA VEPRECULA, Kjellm. 
Kjellman, “ Floridé Sligtet Galaxaura,” in Kong]. Sv. Vet.-Akad. Handl. Bd. xxxiii, 1900, ». 80. 
Amirante, 20-25 fms.; in alcohol. 
Distribution. Indian Ocean, Madagascar. 
5. GALAXAURA OBTUSATA (Sol.), Lamx. 
Solander in Ellis, Zoophytes, 1786, p. 113. 
Lamouroux, Polypiers coralligénes, 1816, p. 262. 
Agardh, Epicrisis systematis Floridearum, 1876, p. 525. 
Saya de Malha, 26 fms.; only a small specimen. 
Distribution. Warm Atlantic, West Indies; Pacific Ocean, Loo Choo Islands, 
Japan. 
SECOND SERIES—ZOOLOGY, VOL. XVI. 36 
