— 89 — 



第 XX 圃版， IO-I2 圆. 10 ： 「パ ラ フ 并 シ ス」 ノ 群 ^fe セ ノレ モ へ 

 ap.— 11 ：幼キ 複子魏 ノー 部； ん ん若キ 「ガメ 一 ト」 51 ； 力，/, 「パラ フ 

 井 シ ス ふ 3 「.ー12： 充分 成熟 シ タ 'レ子 幾 君き； 指宇ハ " iSl 二 m ジ, 



450 



Mesogloia crassa Sunng. 



Nom. Jap. : FutO'Vioazufcu. 

 PL. XX， Figs. 1-9. 



Mesogloia crassa Surinf へ Illustr. Alo-. Jap. I， p. 85, t. X-XII ； De 

 Toni Syll. Alg, III, p. 42S ； Okam. Alg. Jap. Exsic, (日本海 藻 標 品 ）， 

 No. 90; 岡 村， 日本 藻 観 名 戴/. 124. 



Herb. ： On rocks and stones between tide marks in calm places. 

 Rlukiu, Kap'oshima, Aniakusa-IsL, Prov, Chikuzen, Kobe, Provs. Iyo， 

 Sagami, Boshyu and Iwaki. 



Rcmavks : We know, accordino- to the classification p-lven by 

 Kjellman in Enp^Ier unci Prantl's Natiirl. Ptlazenfam. I Th., 2, p. 221- 

 230, that in plants belonging- to the Subfam. M csogloiaccae growth Of 

 frond IS done by the division of upper articulations of younp- assimilatory 

 filaments and in those belono-inor to Eiidcsmac, it is done by subterininal 

 cell-division of axial filaments. As the latter is the case in the plant 

 in question we may think that it is not a species of JMcsogloia, But, 

 as the nature of gametaneia is at present unknown, the true position 

 01 this plant is not certain. Probably an Eudesme ？ 



PL. XX, Figs. 1-9. np-. 1 : Mesogloia crassa with branches 

 stretched out, \ . ― rio". 2 ： half of the cross-section of frond bearing 

 :sporangia, Y* ― J^^^- 3 : siibterminal growincr portion of an axial 



