116 THE -BOTANICAL MAGAZINE. [Vol. xxix. No. m. 



Setchell and Gardner stated (1. c, p. 354) that the 

 present species is "closely related to, perhaps identical with, 

 Farloxvia compressa J. Ag." In the herbarium of the Trinity 

 College, Dublin, the specimens under Gigartina mollis Harv. all 

 agree with the plant distributed as Phyc. Bor-Amer. No. 898. 

 Specimens which are referrable to Farlowia compressa are found 

 in the herbarium among those under Pikea californka Harv. 



They also doubtingly remarked that Prionitis juhata J. Ag. 

 seems to belong to a dwarfed form of Prionitis lanccolata 

 Harv. In the Agardhian Herbarium the species is represented 

 by a specimen sent from Ruprecht under Gelidium crassifolium 

 Rupr., collected by Lutke "in mari septentrionali, inter Asiam 

 et Americam Ross." As far as I could judge from the external 

 appearance of the frond, the specimen appears to be nothing 

 but Farlowia mollis. Harvey in Ner. Bor. Amer. and J. Agardh 

 in Epicris mention both Gigartina mollis and Prionitis jubata 

 separately. In the Agardhian Herbarium, Gigartina mollis is 

 represented by a specimen from San Diego sent by Eaton under 

 "Gigartina gelatinosa J. Ag." It is a quite stranger to G. 

 mollis Bail, et Harv. and resembles to a form of Gigartina 

 Teedii. Very likely the two algologists called one and the same 

 plant with their own names, thinking the two plants not at all 

 related one another. 



Locality. Hidaka Pro v. (!). 



Distribution. Hitherto known from the west coast of North 

 America, from Alaska to California. 



Rhododermis elegans Crouan. 



in J. Ag. : Spec. II, p. 505.— Id. : Epicris, p. 391.— Crouan : Fl. 

 Finist. p. 148, PI. 19, gen. 130, fig. 3.-De Toni : Syll. Alg. IV, p. 

 1710.— Collins : Notes on Alg. VIII, (Rhodora, 1906) p. 160. 



Species of Rhododermis have been discussed by Batters, 

 Heydrich, etc. There seems, however, some points yet remain- 

 ing not satisfactorily fixed. Leaving these points as they are, 

 my specimen agrees quite well with the description and figures 



