74 ART. 12. — K. YENDO. 



Systematic position of the species. Our specimens unfor- 

 tunately lack the reproductive organ, and the exact relationship 

 between the present species and the others is therefore uncertain. 

 But the vesicles, in this species, are evidently transformed from the 

 basal portions of simple leaves; and the branches do not result from 

 the elongation of leaf-segments. This suggests to us to group the 

 species under either Bactrophycus or Arthrophycus. It probably 

 belongs to the latter subgenus standing near Sargassum grande 

 or Sargassum undulatum. From these species ours may be easily 

 distinguished by the peculiar corona and the smooth compressed 

 stem. The present disposition is, however, a provisional one until 

 we have a full knowledge of the reproductive organ. 



Localities: Kushimoto, Kii Prov. (!); Shibushi, Hiuga Prov. 

 (h.s.a.). 



BACTROPHYCUS J. Ag. 



Sargassum Morneri Ag. 



Plate X. 



Spec. p. 38.— 7d: System, p. 307.— J. Ag.: Spec. Alg. I. p. 290.— 7d: 

 Spec. Sarg. Austr. p. 57. — Id.: Anal. Alg. Coiit. III. p. 50 (jiomen). — 

 Hariot: Alg. de Yokosk. p. 218.— De Toni: Syll. Alg. III. p. 20.— 

 Id.: Phyc. Jap. Nov. p. 43. — O. Kuntze: Revis, von Sarg. p. 218 (excl. 

 sjjn.) PI. I. fig. 26.— Id.: Revis. Gen. Plant. III. 2. p. 429.— Okam.: 

 Enumer. Alg. of Jap. p. 144. 



=FuGus Horneri Turn.: Hist. Fuc. Vol. I. p. 34. Tab. 17. 

 = Spongoearpus Horneri Kütz.: Ueber d. Eigeiit. s. 54. — Id.: Tab. 

 Phyc. X. Taf. 89.— /d: Phyc. Gen. p. 365.— Suring.: Alg. 

 Jup. p. 26. — Martens : Preus. Exped. Tange, p. 116. 

 = Sargassum spathulatum J. Ag.: Spec. Sarg. Austr. p. 58. adnot. — 



Id.: Anal. Alg. Cont. III. p. 50. 

 = Sargassum Horneri var. spathulatum Okam.: Enumer. Alg. of Jap. 



p. 144. 

 = Sargassum Fengeri J. Ag.: Spec. Sarg. Austr. p. 58. — Id.: Anal. Alg. 

 Gout. III. p. 50 (nomen).—T>E Toni: Syll. Alg. III. p. 21.— 



