一 205 ― 



Dictyosphaeria lavulosa (Mert. り Decsne. 



Norn. Jap. : Kikko'gtisa. 

 PL XL， Fig. 13-24. 



Dictyosphaeria fdtudosa {Mert. ？) Dccaisne C/ass. Jcs A!g. Calcif p. 

 32; Harv. Ner. Bor-Amer. III， p. 50， t. 44, B ; Kuetz. Sp. A\^. p. 512 ； 

 Id. Tab. Phyc. VoL VII, t. 25， 1; J. Ag. Till Alg. Syst. Ill, p. 118; 

 Askenasy Gazelle p. 8， Taf. II， f. 1-5; Heydr. Beitr. z. Kenntn. d. Al- 

 ^enfl. V, Kais.-Wilh.-Land (Ber. d. d. bot. Gesells., Bd. X) p. 466, Taf. 

 XXIV， f. ふ 10， Taf. XXV. f. 11-13; 岡 村， [1 本 藻 || 名 Ep. 191. 



Hob. ： On rocks between tide-marks. Riukiu, hiuga, Nogamashima 

 in Amakusa Isls" Cape Nomo (Prov. Hizen), Urado and Kashiwajima 

 (Prov. Tosa), Abu (Prov. Awa)， Kushimoto (Prov. iMi) Hamashima 

 (Prov. Shirna), Tago (Prov. Idzu). 



PL. XL, Fig. 13-24. FijJ. 13： fronds of Dictyosphaeria javulosa 

 Decsne. from Riukiu, in nat. state and size. 一 i^ig. 1^: same from Aba 

 in Prov. Awa (col K. Yendo), \. ― Fig. 15 : one of fronds set free and 

 other two coalesced together, せ， 一 1^ ig. 16: one of smaller fronds magd.， 

 showing root-like attaching organs, -^. —— \ ]g. 17 : very young frond, 1 

 mm. in height, f . — Fig. icJ": lon^titudinal section of the same, showing 

 the decay of inner cells, \. ~ Y ig. 19: surface-view of two cells of frond 

 seen from the inner side through the wall, showing the arrangements of 

 tenaculi^, -^. —― ホ 20: portion cf the same magd., 气 -。、 —— t ig. 21 ： mode 

 ot attachment of 2 cells of of trond by the formation of tenacula from outer 

 surfaces of both cells, — £ ― Fig. 22 : two celis, a and b、 of a frond coming 

 into cohesion by forming three tenacula, t, still leaving spaces between 

 ■both cells, ； two cells arc apart from each other at the distance of 20 ス 



