THE FÜCACEJ? OF JAPAN. 127 



superficial is satisfactorily proved by the receptacles. Sargasmni 

 kiushiamim is the only species which is closely related to the 

 present in many respects. These two, however, may be easily 

 separated by the shape of the leaves, the texture of the fronds, etc. 



Localities : var. tyjnca : Tsushima Prov. (Y. Yabe, herb. 

 sr. COLL.); Nagato Prov. (!); Iwami Prov. (J. Nikai, hekb. sc. 

 COLL.); Tzumo Prov. (!); Tango Prov. (!); Sado Prov. (!); Hako- 

 date (!); Eikuzen Prov. (!); Boshu Prov. (!); Shima Prov. 

 (H.S.A.); Kii Prov. (!); Awa Prov. (!); Tosa Prov. (H. Yama- 

 MOTo)(!); Hiuga Prov. (!); Kudo (n.s.A.), Fukuyama (n.s. A.), 

 Oshima Prov. 



var. stipulaia: Ugo Prov. (!); Kikuzen Prov. (!); Sagarai 

 Prov. (h.s.a.). 



Sargassuin nigvifoliwin Yendo. 



Plate XVI. Fig. 1-3. 



Prelim. List of Fuc. Jap. p. 158. 

 Diagnosis. Radice ncnloso-prostrata, pluribus frondibus ex superfacie exeunt- 

 ihus; eaule communi brevissimi mox ramoso plerumque radici con- 

 fluent!; raniis trifjuetris, alterne complanatis, ramulis e margine spiraliter 

 egre<Iientihus ; ramulis tenuioribus, teretibus, triquetris, foliis approxi- 

 matis; foliis fulcrantibus verticalibas, cra.ssis, cartilagineis, lanceolatis 

 vel ovatls, immerse eostatis, plerumque obliquis, petiolis complanatis, 

 ramulorum lanceolatis vel clavatis, evanescente eostatis; vesiculis sub- 

 compressis, ellipsoideis, mucronatis vel subulatis ; receptaculis spathulatis 

 vel subcuneatis, complanatis, apice minute dentatis, in axilla ramulorum 

 solitariis, vel in brevissirao ramulo racemosis. 



Description of the species. The root is a prostrate rugose 

 mass with a number of shoots rising multicipitally from the 

 surface. From the very base of each shoot, many protuberances 

 are sent out confusedly, some of which elongate upwards into 

 the principal branches. As a consequence the root of a w^ell 



