THE FUGACES OF JAPAN. 81 



cylindrical, fusiform receptacles from the latter. It has also 

 some apparent similarity to a certain form of Sargassum micra- 

 canthumy from which, however, it may be distinguished by the 

 thin papyraceous texture of the leaves and the great elongation of 

 the lateral branches, and by the truncated or bidentated segments 

 of the pinnated leaves ; and more easily, when fertile, by the 

 shape of the receptacles. It is an unmistakable species but 

 seems to be comparatively rare. 



Localities : East coast of Japan (Wright, Hakvey) ; Misaki( ! ). 



Sargrissntti serratifolium Ac. 



Plate XI. Fig. 1-7. 



»System, p. 299. — J. Ag.: Spec. Alg. I. p. 291. — Id.: Spec. Sarg. Austr. 

 p. 59.— /J.: Anal. Alg. Cont. III. p. 53.— De Toxi: Syll. Alg. III. p. 

 22. — Id.: Phyc. Jap. Nov. p. 44. — Okam.: Enumer. Alg. of Jap. p. 148. 

 = Fueus scrratifolius Ag.: Dec. No. 31. 



= Fucus longifolius var. tenuifolia Turn.: Hist. Fuc. Vol. II. Tab. 88. 

 =Haloeliloa longifolia Kütz.: Tab. Phyc. X. Taf. 100.—/^.: Phyc. 



Gen. p. 367. 

 =Haloehloa serratifolla Kütz.: Tab. Phyc. X. Taf. 99.— /i,: Ueber 



d. Figent. (Bot. Zeitg. 1843) s. m. 

 = Haloehloa serratifolium ß longifolia Kütz.: Spec. p. 633. 

 = Fucus longifolius Turn.: Hist. Fuc. Vol. II. p. 88. Tab. 104. 

 = Sargassum coryneearpum Harv. (nee J. Ag.): Charact. of New Alg. 

 p. 328.— De Toni: Syll. Alg. III. p. 2b.— Id.: Phyc. Jap. Nov. 

 p. 45. — Okam.: Enumer. Alg. of Jap. p. 151. 



Description of the species. At an early stage of development, 

 the root is disc-shaped with a primary shoot upon it. The stem 

 of the shoot usually ramifies at or near the very base. The 

 stem of the primary shoot as well as the branches develop 

 further, rapidly increasing in thickness and elongating by apical 

 growth. The root eventually becomes a stout conical elevation 

 often exceedino; 4 cm. in diameter at the base. In a well 



