108 THE BOTANICAL MAGAZINE. ("Vol. xxix. xo. 343. 



= Acanthococcus subulatus J. Ag. : Spec. Alg. II, p. 438.— Kutz. : 



Tab. Phyc. XIX, Taf. 26.— J. Ag.: Epicris, p. 351. 

 ?=Cystoclonium armatum Okam. (non Hary.) Bot. Mag. Tokyo, 

 Vol. VIII, p. 1. 



In structure and in having zonately divided tetraspores, the 

 specimens in my hand belong to Mychodea. They are distin- 

 guishable from M. filiformis Kutz. by having the insertions of 

 branches and branchlets markedly constricted. In the Agardh- 

 ian Herbarium, specimen of Acanthococcus subulatus J. Ag. is 

 represented by a plant recalling a slender form of Gracilaria 

 compressa with subulate branchlets. Although I have not ex- 

 amined the structure of the type specimen, I believe my plant 

 belongs to the same species with J. Agardh's. 



Ok amur a has discussed the structure of Cvstoclonium 

 armatum Harv. 3) Haryey 2) remarked that '• there is no medul- 

 lary stratum of filaments " in his plant and an actual exami- 

 nation by myself on the type specimen in the Trinity College, 

 Dublin, endorsed the author's observation. I have also collect- 

 ed similar specimens at Hakodate, the type locality of Harvey's 

 species, with exactly the same structure. Judging from the 

 description and figures given by Okamura, his plant has 

 nothing to do with Harvey's, but seems to be referrable to 

 the present species. 



Locality. Owari (S. Narita, No. 5); Izumi (mis. T. Makino): 

 Chikuzen (T. Ogura). 



Distribution. Canada. 



Callophyllis laciniata Kutz. 



Phyc. Gcner. p. 401— Id.: Spec. p. 744.— Id.: Tab. Phyc. XVII, 

 Taf. 84.— De Toni : Syll. Alg. IV. p. 278.— Borgesen : Mar. Alg. 

 Faroes, p. 359. 



The Japanese form of the present species is also as variable 

 as the European. In some case it may approach to C. crispala 



1) Okamura: Bot. Mag. Tokyo, Vol. VIII, p. 1. 



2) Harvey : List of dried plants collected in Japan, p. 332. 



