296 



F. BORGESEN 



Crouania J. Ag. 



C. attenuata (Bonnem.) J. Ag. 

 Agardh, J., Algae mediterr., 1842, p. 83. 



Some fragments of a very small form were found. GRUNOW in »Alg. 

 Novara», p. 62 mentions having found a very delicate form at Tahiti. 



Area of distribution: Mediterranean Sea, warmer shores of the Atlantic 

 and Pacific Oceans. 



Carpoblepharis Kiitz. 



C. Schmitziana (Reinb.) Okamura. — Fig. 36. 



Okamura, K., On Microcladia and Carpoblepharis (Bot. Mag., vol. XIV, 1900, 

 p. 8, pi. I, figs. 14—17. Icones of Jap. Alg., vol. I, pi. II, figs. 5 — 18). — Gloio- 

 thamnion Schmitzianum Reinbold, Hedwigia, 1895, Bd. 34, p. 205, pi. III. — Rein- 

 boldiella Schmitziana (Reinb.) De-Toni, Syllog. Alg., vol. IV, sect. Ill, p. 1498. 



On a stone with several other small algae some few bits of a very delicate 

 species were found, which I feel convinced belongs to C. Schmitziana, first 



described by R.EINBOLD, even if the Easter Island 

 plant seems to be much smaller and differs a little 

 in its habit from REINBOLD's figure. 



The plant grew on a Cmoriella to which it is 

 fixed by means of numerous rhizoids growing out 

 mostly in bundles from cortical cells. 



The decumbent rhizome-like parts of the thallus 



are about 60 a thick. From this now and then 



branches are given off; some of these soon stop their 



growth, become more or less vertical, and reach a 



length of up to 200 — 300 p.; but most branches 



Fig. 36. Carpoblepharis Schmitz- show an indefinite growth like the mother filament, 



tana (Reinb.) Okam., fragments fixing themselves to the substratum. 



of plants c 90 /i 



The erect branches become more or less flattened 



with a broad obtuse tip; they sometimes are as much as 50 [i wide, but often 

 only half that size. Longitudinal growth is performed by a broad top-cell. 

 The segments cut off often remain distinct long after they have become divided 

 into smaller cells. 



The main shoots are covered with a dense, untransparent cortex. 



The material is sterile. 



I have followed OKAMURA in referring this species to CarpoblepJiaris. It 

 seems to be a highly variable plant, more so if the small reduced forms, referred 

 here with some doubt by Mme. Weber 1 , really belong to the same species. 

 The Malayan plant has the creeping rhizome-like base reduced to a mono- 

 siphonous filament, a rather remarkable fact. 



Area of distribution: Japan, Malayan Archip., Easter Island. 



1 Liste des Algues du Siboga III, Rhodophyceae II, p. 336, figs. 126—7. 



