MARINE ALGAE FROM EASTER ISLAM) 



28l 



Fig. 27. Caulacanthus spinellus 



(Hook. f. et Harv.) Kutz. Part of 



specimen, c. 17 />- 



Fig. 28. Caulacanthus spinellus (Hook. f. et Harv.) Kutz. 



a longitudinal (c. 25O /0 and b transverse section of thallus 



(c. 170 /i); c apex, c. 450 /i. 



mannia setacea to which it bears a considerable external resemblance; the 

 anatomy is, however, essentially different. 1 



Caulacanthus indicus Weber v. Bosse is a much larger plant, the thallus 

 being 1 — 2 mm broad; in its outer habit it seems quite to agree with the 

 present plant, having the same antler-like ramification and the same discs by 

 means of which it attaches itself to other algae etc. 



Area of distribution: New Zealand, Easter Island. 



Fam. Rhizophyllidaceae. 



Rhizophyllis Kutz. 



Rh. pacifica nov. spec. — Fig. 29 — 31. 



Thallus crustaeformis, membranaceo-corneus, margine irregulariter lobato, 

 lobis anastomosantibus, rhizoideis perlongis numerosis ex parte thalli deorsum 

 vergente natis adfixus. 



Thallus dorsiventralis, e stratis duobus compositus, stratum superius corti- 

 cale e cellulis 2 — 3 minoribus constat in filamenta ordinatis; inter ea glandulae 

 majores sparsae sunt. 



Compare my figures in Mar. Alg. D. W. I., vol. II, p. 369. 



