120 THE BOTANICAL MAGAZINE. [Voi.xx111.xo.270. 



Halimeda incrassata var. ovata J. Ac. 



Till Alg. Syst. VIII. p. 86.— De Toni: Syll. Alg. I. p. 523.— Barton: 

 Halimeda. p. 27, fig. 42, 47. 



My determination is based on Barton's excellent paper, 1. c. 

 Okamura reported H. tridens Lamx. from Loochoo (Enumer. 

 of Jap. Mar. Alg. p. 187). This species is placed in the synon}-- 

 mous position to H. incrassata Lamx. by Barton after her care- 

 ful study. Okamura's specimen, therefore, shall naturally come 

 under the species incrassta and not unprobably under the present 

 forma. I simply report that a plant which exactly accord with 

 the definition of the above mentioned forma exists within our 

 boundary. 



Loc. Botel Tabago (G. Nakahara). 



PHAEOPHYCEiE. 

 Dyctiota naevosa J. Ag. 



vSpec. Alg. I. p. 95.— Id:. Till Alg. Syst. V. p. 90— Id: Anal. Alg. 

 Cont. I. p. 70.— De Toni : Syll. Alg. III. p. 266. 



=Zonaria naevosa Sur.: Alg. Ecklon. No. 8. Tab. I. fig. 4. 



= Dyctiota polycarpa Sond.: in Kutz. Tab. Phyc. Bd. IX. Tab. 31. 



=Dyctiota grandis Kutz. Spec. Alg. p. 557.— Id:. Tab. Phyc. Bd. 

 IX. Tab. 32. 



= Cutlcria naevosa Hering: in Kutz. Spec. Alg. p. 559. 



Our plant exactly answers to the definition and illustrations 

 of the above mentioned species. In some of the specimens in our 

 possession the basal part of frond is not attenuated, but already 

 flat and broad at the rhizine-bearing point. 



Loc. Hizen Pro v. (K. O shim a). 



Pylaiella litoralis var. opposita f. rupincola Kjkllm. 



Handbook i Skand. Hafs-Algflora. I. Th. p. S4.-De Toni: Syll. 

 Alg. III. p. 531.-SETCH. ct Gard.: Alg. N. W. Amcr. p. 235. 



