Oct., 1915.] A". YENDO.—ERTTHROPHYLLUMGMEUNI QRUN.). 235 



californicum J. Ag. and Crossocarpus lamuticus Rupr. The 

 former is a name, as already pointed out by SETCHELL and 

 Gardner, and after my own examination on the originals, 

 given to a fruit-bearing, aged form of Erythrophvllum deless- 

 rioides J. Ag. Repeated observations on the sections of the 

 blades of E. delesserioides, invariably proved the identity of the 

 structures in both it and the present plant. 



Erythrophvllum Gmelini (Grun.), as now I propose to call 

 the present plant, seems to me apparently common in the North 

 Pacific. As the species has been incompletely described without 

 any illustration, some doubtful forms of it might have been 

 passed under various specific names. It will not be superfluous 

 to mention below something to be further studied relating to 

 this question. 



Both Crossocarpus and Erythrophvllum were hitherto re- 

 presented by single species. They were readily distinguished 

 from each other when provided with the cystocarps 2) ; and when 

 sterile, by the absence or presence of the midrib. In the structure 

 of blade and in having the characteristic homogeneous cell- 

 content, both have common peculiarities. Now the species under 

 consideration is known in the sterile form only, as it appears 

 to me, and has no sort of midrib in the blades. Consequently, 

 it may be doubted if it will be better reckoned under Crossocarpus 

 than Erythrophvllum. But the formation of the stem in an 

 advanced stage of development as well as the substance of the 

 blades, lead me to expect to find its cystocarps in the manner 

 of Erythrophyllum and not of Crossocarpus. 



Ruprecht illustrates three specimens of Crossocarpus lamu- 

 ticus in his Tange des ochotischen Meeres, PL 14. The form 

 represented by fig. c in the same plate resembles so much with 

 a young stage of the present species, and it was one of my 

 prospects during the tour in Europe to examine and compare it 

 with the other forms shown in the plate. In the herbarium of 

 the Academy of Science of St. Petersburg, I have seen one of 



1) 1. c, p- 304. 



2) Cfr. Kuprecht: Tange des ochotischen Meeres, p. 265; and Setchell and 

 Gardner : Algae of Northwestern America, p. 304. 



