3 



Ryukyu ; Arikawa in Isl. Goto, Nagasaki, Shimabara and Nomo 

 (Prov. Hizen), Aburatsu (Prov. Hyuga), Mukushima (Prov. Bungo) ; 

 Provs. lyo, Shinia, Mikawa, Totomi, Suruga, Boshyu, Kadzusa, 

 Iwaki, Rikuzen, Idzumo, Iwami, Oki and Sado. Common along the 

 coasts of the Pacific and the Japan Sea in warmer parts of the 

 country. Fruits : late spring to summer. 



PL. CI. Fig, 1 : frond of Plocamium abuorme H. et H., \. 

 Fig. 2 : growing apex of the frond, ^. Fig. 3 : young ramelli, 

 3 !p. Fig. 4 : portion of an upper branch taking holds of another 

 alga, f. Fig. 5 : basal rooting portions of the frond ; p, primary 

 root ; r, secondary roots ; s, stones ; f . Fig. 6 : portion of an up- 

 per branch showing the central axis and veins, T. -Fig. 7 : portion 

 of fig. 6 ; a, a, the central axis of rachis ; b, vein ; ^. Fig. 8 : 

 portion of fig. 7 still highly magd., to show the thickness of cells 

 and pits ; a, a, and b, same as fig. 7 ; ^f 3 . Fig. 9-11 : different 

 forms of sporophylls ; 9-10: "; n: ^*. Fig. 12: cross-section 

 of a sporophyll, 3 }. Fig. 13 : cystocarp, \ e . Fig. 14 : portion of 

 the vertical section of a cystocarp showing the neucleus, ^f 3 . 



PL. CII., Fig. 1-2. Fig. 1 : portion of the frond of Floca- 

 miitm abnorme f. nncinatum Okani., }-. Fig. 2 : portion of a 

 branch, \, 



PlOCamium (Lamour. 1813) Lyngbye 1819. 



RHODYMENIACEAE. 



- m ^ Ji * * -y 



HJS * ^tt y, -* ^ fl 2-5 ^E / ^ 7 40 36 r Hi -y, h^cS 



it 'I 3 V IP] E / a ? Hi * ; ffi - *W Mil li * r BK ? , g 



