132 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



(8) RHODYMENIA INDICA Web. v. Bosse, Liste des Algues du 



Siboga (1928), p. 460, fig. 196. 



No specimens have been seen, but the tetrasporic sori described as 

 "worm like" would seem sufficiently distinctive for identification. Mme. 

 Weber found it near to certain forms of R. palmata and thought it to be 

 a connecting type between the northern forms and the southern ones now 

 known under the name R. pahiatifor/nis Skottsb. 



Distribution. — ^The type from the coast of Borneo at a depth of 40- 

 50 m. 



(9) RHODYMENIA SPINULOSA Okam., Icones Jap. Algae 



(1934), vol. VII, no. IV, p. 33, pi. 318, figs. 1-6. 

 "The present plant shows a close affinity with R. punctata Okam. 

 from which it differs in having marginal spinules." — Okamura. 

 Distribution. — The type from Tainan, Taiwan (Aoki), Japan. 



(10) RHODYMENIA PUNCTATA Okam., Icones Jap. Algae 

 (1929), vol. VI, no. 2, p. 13, pi. 258. 



Okamura gives ample description and illustration of this Japanese 

 species. His figure of the tetraspores shows the characteristics of this 

 section very well. 



Distribution. — The type from Prov. Tosa, Japan. 



(11) RHODYMENIA CO ACTA Okam. et Segawa, in Segawa. 

 Mar. Alg. Susaki (1935), p. 84, pi. 20. 



This plant is easily distinguished from its allies by the decumbent, 

 matted habit of the crisped fronds. 



Distribution. — ^The type from Shikineshima, Prov. Idsu, Japan. 



(12) RHODYMENIA PALMATIFORMIS Skottsb., in Kylin & 

 Skottsberg, Subant. und Antarkt. Meeresalgen (1919), p. 21, 

 figs. 11, 12; R. palmata (L.) Grev. quoad plantam australem; 

 R. palmata et palmetta, Reinsch, Meeresalg. Sudgeorg. (1890), 

 p. 379; R. georgica Reinsch, I.e.? 



This species was established to embrace all the southern forms of a 

 somewhat heterogeneous assemblage which had previously been identified 

 with the northern species R. palmata. Skottsberg says : "These are simi- 

 lar to <:ertain forms of the variable R. palmata; I have, however, found 

 no southern forms which can be identified with a northern form." 



Skottsberg figures a cross section of the frond to illustrate his idea of 

 the sharp line of demarcation between the medulla and the cortex. In our 



