150 AKT. 12. — K. YENDO. 



sex, linear-elongated, acuminated ones do so. But this of course 

 is not always strictly carried out. 



Systematic position of the species. The present species has 

 been placed under the subgenus Bactrophycus by J. Agardh ; but 

 there seems to be no affinity between it and the remaining members 

 of that subgenus except in the fact that the leaves are strongly 

 retrofractive. The Bactrophycus is characterized by having each 

 receptacle accompanied by a bractlet at its base ; the terminal 

 one or two only being free from any appendage. In this species, 

 as described above, the receptacles are bractless from the beginning 

 and are disposed in a raceme on an ultimate ramulet. This 

 character suggests that tlie present species belongs to the tribe 

 Racemosœ and should be placed near Sargassum Hensloiuianum 

 J. Ag. 



Localities : Nagato Prov. (J. -Nikai, h. sc. coll.) ; Tsushi- 

 ma Prov. (h. s. a.) ; Korea (Ckouan, J. Agaedh) ; Izumo 

 Prov. (!) ; Tango Prov. (!); Sado Prov. (!) ; Shakubetsu (h. s. a.) ; 

 Mouth of Amur River (Fengee, J. Agardh) ; Kushiro Prov. (h. 

 s. A.) ; Pikuzen Prov. (!) ; Hitachi Prov. (!) ; Böshü Prov. (!) ; Izu 

 Prov. (!) ; Shimoda (Wright, Harvey); Sagami Prov. (!) ; Shima 

 Prov. (!); (h. s. a.); Awa Prov.(!) ; lyo Prov. (!); Bungo Prov. (!) ; 

 " Warmer parts of the Pacific coast of Japan " (Okamura). 



Sarf/assum siliqosiun J. Ag. 

 Plate XVII. Pig. 1. 



8])ec. Alg. I. p. 316. — Id.: Spec. Sarg. Austr. p. 121, Tab, X, — Ki'TZ.: 

 Spec. Alg. p. Oil).— Dk Toni: Syll. Alg. III. p. lQl.~Id.: Pliyc. Jap. 

 Nov. p. 45. — Martens: Preus. Exped. Tange p. IIG. 



= Sargassum ornatum Gkev.: Alg. Orieut, in Ann, antl Mag. of Nat. 



Hist. Vol, II, p. 205 Tab, IV. and in Tians, Bot, Soc. Edin, 



p. 87 PI. VI. 



