68 



SS S i- > v Ifc W ? 3t ** * " / 'f; * !> t- ^ - n FB Jff ? f ft * ? M - 

 M l- i- * ? M Hf ^ ? t- ffl. -TO! * /" - M ^ V 



Jg CLXVI |3 US. 1 : Heterosiphonia pulchra (Okam.) Fkbg, LI 7- li 

 6, ' SS, 1-2: $ g ifi, 2 f .-3: ft / --^ * i/ 7, W ^ 02 ?1J / JUc 



? ^ ^, Y * : fe ' fit if if. ? --5 : m $ ^ ss fa ? ^ ^; ^ s - 



r^ -^ ^ f-'r j r y , \ 2 .6 ;f> * * f r j, "/' .7 : ^i *, /If5 ^-8 : 

 t * H. notoensis b -y * I" * / , fit, }, 9 : Pfil ^ S *5, ' ; ^. 10-11 : 



4i: l() - 11 il / b F-Il ^ ^ A' 0r 3 J ffl /" ft: /fr. ^' PS ft; /, M Pfi ft, 

 Y .12 : In] _h ' ft ^ tS' D( IB, Y --13 : T & ' ^ ft - ** ^ ^ r ^ 



-f 3f s? T j, Y . 



Heterosiphonia japonica Yendo, 



Nom. Jap, : holia.ai. 

 PI. CLXVII. 



Heterosipfionia japonica Yendo Nov. Alg. Jap. Decas l-III, no. 23 (Hot. 

 Mag. Tokyo, Vol. 34, n. 397, 1920, p. 8). H. dciixa Okam. n. sp. mscr. 



Frond erect, rising from a small scutate disc, with a more or less dis- 

 tinct main stem, or often divided into many main divisions from near 

 base, 10-20 cm. high, 0.5-0.8 mm. thick at thicker portion, 34 times 

 pinnately branched in a distichous manner. Branches of every order 

 arise from every node in an alternate manner, more or less slightly 

 nexuose, more so in slenderer portions. Dorso-ventral character is well 

 shown in the arrangement of pinnae (i.e. branches having definite growth), 

 which arise on the dorsal side of branch and are directed toward the 

 apex of the segment bearing them (Fig. 2). Pinnae patent, sometimes 

 quite simple, 1.5-3 mm. long, but more often once or twice forked or 

 dichotomo-pinnately branched with parted lacineae, either monosiphonous 



