in A]IT. ]_'. K. YEN no. 



thin and membranaceous in substance. One of the specimens 

 from Shiranuka, Prov. of Kushiro, has the rib quite obsolete 

 above the middle portions of the frond. The specimens from 

 Shari and Sliitsnnai have some likeness to both /. contracta and 

 /. angusta, l)nt more closely resemble the latter. They are 

 characterized by well-defined receptacles and minute but promi- 

 nent, densely aggregated conceptacles (PI. I. fig. 1.). One of the 

 specimens from Kushiro stands very near to them but has much 

 larger receptacles which measure !.. 5-2.5 cm. in length and 1.- 

 1.2 cm. in breadth, bifurcating with wide angles, thus approach- 

 ing more closely to /. macrocephala Kjellm. The specimen 

 from Osatsube is applicable to /. cornuta Kjellm., though 

 fragmentary and sterile ; but ours has the receptacles simple or 

 only once forked, and most of them are very well defined at the 

 base. Kjellman" mentions /. nana and /. bursigera from 

 Spitzbergen Island at the high water mark or in the liver 

 mouth. X specimen which approaches these formte was found at 

 Esashi in the Province of Kitami and is now in the herbarium 

 of the Department of Fisheries of the Hokkaido Local Govern- 

 ment ; PI. I. fig. 2 represents a part of it. 



Beside the above mentioned forma? others might be pointed 

 out. It would, however, be unimportant to add to algological 

 literature more formal names, established on what I regard as 

 invalid local forms. 



Localities: Zenigamezawa (n. ir. r.), 8hirikishinai (ir. h. f.), 

 Todohokke (ir. s, a.), Osatsube (n. ii. i\), Oshima Prov.; Mororan 

 (h. s. a.) (!), Urakawa (ir.ir. i-.), Shamani (h.s.a.), Saruru (h. s.a.), 

 Iburi Prov.; Shitsunai (ii.s.A.^ Shoya (h.s.a.), Hidaka Prov.; 

 Shiranuka (h.h.f.), Kushiro(!) (H.s.A.),'Kushiro Prov.; Nemuro (!) 



]) KjEiXMAN': Orn Spetzbcrgens Marina Klor. Tliallopli. II. p. 1. 



