THE FUGACES OF JAPAN. 89 



/. tnnrrocarpa Yendo. I'latc XII. Fig. 8. 



Prelini. List of Jap. Fuc. p. 156. 



= Sargassum macrocarpum A(!.: System, p. .'>07. — Id.: »Spec. p. 3G. — 

 J. Ag.: Spec. Alg. I. p. 293. — Id,: Spec. Sarg. Austr. \^. GO. — 

 Id.: Anal. Ali;. Cont. III. p. 53.— Okam.; Enumcr. Alg. of 

 Jap. p. 140.— De Toni : Syll. Alg. III. p. 24 p.p.— Id.: Phyc. 

 Jap. Nov. p. 44. 



=HaJoehloa pohjacantha Kütz,: Tab. Phyc. X. Taf. 98. — Id.: Ueber 

 d. Eigeiit. (Bot. Zeitg. 1843.) s. 56. 



=HaIoehloa maeracantha Kütz.: Tab. Pliyc. X. Taf. 97. fig. 2. 



Remark on the forma. I identify one plant as Sargassum 

 macrocarpum Ac;. As the original diagnosis is so very simple that 

 it may be applied to other allied species, my identification is 

 mostly based on the descriptions given by J. Agardii. If the 

 determination by the present writer has been correctly done, the 

 plant is by no means a valid species but may be connected with 

 the typical form of the present species by various gradations. 

 Still it often exhibits some remarkable characters and is worthy 

 of mention in a formal rank. 



The essential characters of the frond are similar to the type. 

 The total length of a well grown plant often measures 7-8 feet 

 with the lateral branches as long as 1-1.5 feet. The vesicles at 

 the basal portions of the lower branches are remarkably large 

 attaining sometimes 2 cm. in length, with a short sub-ancipitous 

 stalk, crowned with a narrow, dentated, ribbed, and glandulated 

 leaf. Those on the terminal branchlets are nearly equal to those 

 of the type. The leaves sometimes become as long as 15-18 cm. 

 and are generally very stiff and coreaceous, with the ribs dis- 

 tinctly elevated almost to the tips. The margin is coarsely but 

 deeply dentated with the sini round and the laciniie deltoid and 

 curved upwards. The cryptostomata are conspicuous in some 

 individuals but entirely wanting in others. The spinous processes 



