— 236 —— 



II, p. 96 ； Id. Epicr. p. 76 ； Harv. Ner. bor. Amer. II， p, 222. ― Ptilota 

 phunosa o sei'vata Kuetz. Sp. Alg. p. 670 ； Id. Tab. Phyc. XII, t. 55, 

 t. e-f. — Ptilota phunosa var. asplenioiacs Ap-., Lyng-b, Hyclropnyt. 

 Dan. p. 38, t. 9， f. A. — titcits pcctinatits Guun. Fl. Nov. II、 p. 122, — 

 Ptilota phunosa /5 Pt. formosa Kuetz. Sp, Alg*. p. 669. — Pbtmaria 

 pcctiiiata var. integrrima Rupr. Alg. Ochot. p. 334. 



Hab. On rocks between tide-marks. Isl. Urupp ； Urakawa 

 and Otaru (Hokkaido) ； Prov. Rikuchu. ― Antheridia Aprile (Ura- 

 kawa.) ； tetraspores and cystocarps : summer. 



Remarks. Antheridia are mostly produced from the pinnulae 

 arisinp" from the inner side of compound pinnae ； sometimes they are 

 formed from those of the outer, but this is rarer in case ana few in 

 number. Again they are transformed from marp-inal teeth of simple 

 pinnae ； in this case, the maginal teeth develope into pinnated 

 ranuili (hp*. 10). The development of anthericlial pinnulae is exactly 

 same as that of tetrasporic pinnae, as it is easily seen by comparinp- 

 fip". 7 and 1 2. 



f. litoralis Kjellm. the Algae of the Arctic Sea p. 174, Tab. 

 15' fig' --5- . 



Hab. . Otaru and Mashike (Hokkaido) ； Kesennuma (Prov* 

 Rikuzen). 



PL. XLVII. Fig. 1: trond Ptilota pectinata (Gunn.) Kjellm. 

 in nat. size. ― Fip\ 2 : cross-section of the thicker portion of a branch, 

 ca. や. 一 Fi cr. 3 : portion of a sterile branch, ？. ― Fig. 4 : deeply 

 serrated pinna (from Isl. Urupp.), ― Fig. 5 : branch with tetrasporic 

 pinnae, 气旦. 一 Fip-. 6 ： upper pinna of tetrasporic frond, ？. ― Fig-. 7 ： 

 beginning of a tetrasporic pinna, ず Q. ― i^ig. 8 ： tetrasporic pinna, 

 や. ― Fig. 9: pinnulae and pinnellae ripening tetraspores, 2!。. ― Fig. 



