MARINK ALGAE FROM EASTER ISLAND 



26 I 



pointed out (1. c.) this pedicel is not mentioned in the description of KuCKUCK 1 

 nor figured in REINKE's Atlas, pi. 5 — 6; but it is present in HaRVEY's figure 

 in »Phycologia Brit.», pi. 98; this character is, perhaps, not a reliable one. 



Area of distribution: West Indies, Malayan Archipelago, Easter Island. 



Fam. Elachistaceae. 



Elachista(?) spec. — Eig. 10. 



On an old basal part of a SargassumiJ) a small brown alga was found 

 which might perhaps be referred to the genus ElacJiista as it shows a good 



Fig. 10. E/achistaQ) spec. Fragments with assimilatory filaments, mature and empty pluri- 

 locular sporangia; in b the basal part of a hair. C. ii0 /i. 



deal of likeness to ElacJiista rosarioides and E. pusilla described by SKOTTS- 

 BERG in Bot. Ergebn. d. schwed. Exp. nach Patagonien und dem Feuerland, 

 1907—9, VIII. Marine Algae, 1. Phaeophyceae, p. 21—23. 



The plant forms small tufts. The basal part is endophytic, consisting of 

 thin-walled, more or less barrel-shaped cells, about 15 fj, wide and of almost 

 the same length. 



From the basal part arise hairs, long assimilating filaments, and shorter 

 fertile branches. 



The assimilating filaments are rather thin at their base, about 4 — 7 a, 

 with cells up to 30 [i long. Upwards the thickness increases to about 12 — 18 \tr, 

 at the same time the cells are proportionally shorter as they mostly keep the 



1 Kuckuck, P., Bemerkungen zur marinen Algenvegetation von Helgoland, I, p. 244. 



