MARINE AI.GAK FROM EASTER ISLAND 



179 



The stem portions between the hair whorls consist of short assimilating 

 filaments only. In the uppermost glabrous part of the thallus the structure of 

 the peripheric tissue is quite different (Fig. 24 c). It is composed of oblong- 

 subcylindrical cells, about 60 \). long and 24 ;j. broad and closely packed together. 

 The tissue in the interior of the whole thallus is composed of long irregularly 

 bent subdichotomous filaments woven together. 



Of species with terete thallus only one, G. lenta, is listed by KjELLMAN 

 in his work of Galaxaura. The present species is quite different. With regard 

 to the basal part our plant looks rather like G. arborea Kjellm., but in other 

 respects this species differs greatly from the present one. 



Area of distribution: Endemic. 



Fi<r. 25. Galaxcxura paschalis nov. spec. Short and long assimilating filaments, c. 17u /'. 



Fam. Gelidiaceae. 



Gelidium Lamour. 



G. pusillum (Stackh.) Le Jolis. — Fig. 26. 



Le Jolis, Liste, p. 139. — Gelidium repens Okamura in Bot. Mag., vol. 13, 

 1S99, p. 7, pi. II, figs. 5 — 8. 



This small plant, well known from the coast of Europe, has been found 

 by OKAMURA at the coasts of Japan and Australia and was at first regarded 

 by him as a new species. But in a later paper: List of marine Algae collected 

 in Caroline Islands and Australia (Bot. Mag., vol. 18, 1904, p. 86-87) Okamura 

 rightly referred his species to G. pusillum. 



Quite as is the case with the plant of OKAMURA the plant from the Easter 



