165 

 the writer, therefore, that there can be no reasonable doubt but thal 

 the C. rosa marina and the C. Sitchensis of Postels and Ruprecht 

 are one and the sanie species which must be known under the name 

 of Coìistanlinea rosa marina (Gmelin) P. & R. 



Having thus determined that C. Sitchensis P. & R. is to be pla- 

 ced under C. rosa marina (Gmelin) P. & R. and that the genus as 

 limited by Schmitz and Hauptfleisch is to be reduced to a single 

 species, it is desirable that specimens referred by one and anolher 

 writer to either one of these names be examined carcfuliy to deter- 

 mine the accuracy of the references. 



Harvey, in bis Algae of the Northwest Coast of North America 

 (18Ó2, p. 172) refers plants collected by Lyall at Victoria in British 

 Columbia, to Constantinea Sitchensis. An examination of these plants 

 in Herb. Harvey in the collections of Trinity College, Dublin, shows 

 that, while they look like plants of C rosa marina, besides having 

 more ampie laminte, they bave also a mcthod of origin of the new 

 blades differing decidedly from that of the St. Petersburg specimens 

 both of C. rosa marina and of C. Sitchensis. The proliferation which 

 gives rise to the new biade is at first elongated and subulate instead 

 of depressed and rosulate as in both the species of Postels and Ru- 

 precht. Consequently, these plants connot be the same as C. Sit- 

 chensis P. & R. and the name C. subulifera will be proposed for 

 them. 



When J. G. Agardh, in bis Species Algarum, wrote bis first 

 account (i85i, p. 295 et seq.) he had not seen a specimen of any 

 species of the genus but when he revised bis account in a later vo- 

 lume, the « Epicrisis » (1876, p. 225), he had received an authentic 

 specimen of C. rosa marina, but not of C. Sitchensis. He had, ho- 

 wever, also received specimens from Farlow which he was inclined 

 to refer to C. Sitchensis and two different sets of specimens thus 

 received are ali that are to be found in the C. Sitchensis - species - 

 cover in bis herbarium today. Similar specimens were distributcd in 

 Farlow, Anderson, and Eaton' s Algae Exsiccatae Americae Borealis, 

 No 48, under the same name, and again later in Collins, Holden, 

 and Setchell' s Phycotheca Boreali-Americana, N. qSo. The writer 

 (cf. Setchell, in Zoe, voi. 5, p. 127, 1901) has shown that ali of 

 these plants are alike and belong to a species of Constantinea to be 



