126 THE BOTANICAL MAGAZINE. [Vol. xxm. No. 270. 



extending northward as far as Behring Sea (Notes on Kelp. p. 

 445). In his later work joined with Gardner, 1. c, he omitted 

 to mention it on the north-west coast of North America. The 

 present writer has collected L. Sinclairii on the coast of Van- 

 couver Island in 1901. It conceives me to believe that Set- 

 chell ceased to assign this species to the Alaskan coast. It 

 is, however, very probable that both L. Sinclairii and L. lon- 

 gipes exist in the American side of the North Pacific. So far 

 as my researches extend, L. Sinclairii seems to be absent within 

 our boundary. 



Loc. North Kuriles. 



RHODOPHYCE.-E. 

 Porphyra miniata f. amplissima Rosenv. 



Groenl. Havalgfl p. 827.— Borges.: Mar. Alg. Faeroes, p. 347. 

 =Diploderma amplissimum Kjellm.: Alg. Arct. Sea. p. 188, Pi. 

 17, fig. 1-3 ; PI. 18, fig. 1-8. 



=Diploderma amplissima f. typica Fosl.: Contr. Mar. Alg. Norw. 

 I. p. 56. 



— Wildemania amplissima Fosl.: Contr. Mar. Alg. Norw. II. p. 14. 

 -De Toni : Syll. Alg. IV. p. 24. 



= Porphyra amplissima Setch. et Hus : in Hus ; Prelim, notes 

 Porphyra. p. 67. — Hus : Account Porphyra. p. 215. 



This species is found copiously growing attached on the leaves 

 of Phyllospadix Scouleri. While yet very young, the general 

 habit of the plant resembles to that of Porphyra najadum 

 Anders, of the north-west coast of North America. When dried, 

 however, the latter turns into a dull purplish colour while the 

 former gains a beautiful red. Not seldom it is also found on 

 Iridaea, Chordaria and others which inhabit below low water 

 mark. 



In Japan the plant seems not to attain to such a remarkable 

 size as reported on the European or the American specimens. 

 The largest specimen I ever collected measures 13 cm. in length 



