112 Vol. XLIII., Art. 1.— K. Yendo : 



arrangement of the sporophylls is nearly constant and unrivalled 

 in its regularity among the Atlantic members of the genus. When 

 the sporophylls are densely aggregated, the plant may often show 

 a character comparable with A. graudifolia J. Ag. On the con- 

 trary, when they are widely separated, such as in an immature 

 specimen, the plant may often be taken as a form of A. Pylaii 

 Geey. In the present species the narrow cuneate sporophylls and 

 their regular arrangement, with each petiole distinctly separated, 

 are well defmed and most important characters for distinguishing 

 it from its allied species. 



Remar'ks on the sijnonyms. In the sense of the old writers. 

 Fucus csculcutus, now called Alaria escuJenta, covers almost all 

 species of what at present we bring under the genus Alaria. Even 

 to such a keen observer as Harvey, distinctions between various 

 specimens accessible to him have not been regarded as important 

 enough for separation into independent specific rank. In the 

 floristic lists of the North Pacific, written by early writers, there- 

 fore, the name Alaria esculenta is repeatedly mentioned. The 

 Pacific Ocean, .however, does not produce this species so far as 

 our present researches extend, hence the specific name in such 

 lists does not mean more than " Alaria sp." 



When RuPEECHT worked out Tange des ochotischen Meeres, 

 lie distinguished three species of Alaria, viz,, A. esculenta, A. fistu- 

 losa and A. marginata. He chose, however, to call them by the 

 genus Fhasganon instead of Alaria, and A. escule7ita was synony- 

 mized under Phas. alatum, which specific name he found in 

 Caegill's work. It is therefore quite natural that we find various 

 different species of Alaria, in our specific conception, from the 

 North Pacific under the species cover of Phas. alatum in the her- 

 barium of the Academy of Science of Petrograd. Two authentic 



