592 THE FUR SEALS OP THE PRIBILOF ISLANDS. 



agrees thoroughly with the descriptions of Agardh aud of Areschoug (1883), especially 

 with that of the latter, is the same as Kjellmah's. The plant was well known to 

 Euprecht (1851, 232 and 351), who has given it two additional names, Laminaria 

 repens and Lessonia repens, while Agardh has referred it to the genus Arthrothamnus. 

 Our plant, however, is certainly not a member of this latter genus, for it lacks alto- 

 gether the characteristic auricles at the base of the blade; and the folds (at the base 

 of the blade) described by Agardh may very likely be nothing more than the products 

 of imperfect drying. The plant has a most striking resemblance to Laminaria 

 sihclairii in habit, so much so, that it can not be told from certain forms of that 

 species until an investigation into the character and distribution of the muciferous 

 canals is made. Then it is seen that there are no canals at all in the stipe, while 

 those in the blade are large and frequent, as is shown in the figure of the cross 

 section on the plate attached to this article. The habit is also well represented in 

 the plate, and the rhizome shows especially well. It is the rhizome that gives it the 

 particular resemblance to Laminaria sinclairii, and is a characteristic shared with 

 it only by L. japonica and L. rodriquezii (cf. Bornet, 1888, p. 2), besides the species 

 mentioned. Bornet mentions (1. c, p. 2) also L. bongardiana, but the writer has not 

 seen any specimens of that species thus provided. Areschoug also includes this 

 last species among the rhizomatous Laminariae, but only as to the " forma subsessilis.^^ 

 L. longipes was collected by Messrs. Greeley and Snodgrass, but the specimens are all 

 sterile. (Bering Island.) 



Laminaria digitata is credited by Euprecht to St. Paul, but it is uncertain just 

 which one of the digitate forms of modern writers he had before him (cf. also Kjell- 

 man, 1890, p. 170). 



Agarum turneri P. and R. Ruprecht, Tange Och. ; 244, 1851. Kjellman, Beringshafvets Algflora; 

 42, 1889. 



A portion of a frond is present in the collection received from President Jordan 

 and Euprecht mentions it as well from St. Paul Island. (Konyam Bay; St. Lawrence 

 Bay; St. Lawrence Island.) ' 



Thalassiophyllum clathrus (Gmel.) P. and R. Kjellman, Berlngshafrets Algflora; 42, 1889. 



Only two specimens of this magnificent plant are known to me from St. Paul 

 Island, one of which is in Herb. Baton at Yale University and the other in Herb. 

 Farlow at Harvard University. They were both procured for Professor Eaton by the 

 Alaska Commercial Company in 1877. (Bering Island.) 



Nereocystis luetkeana P. aud R. 



This species is unknown with certainty from the Bering Sea. Kjellmann does not 

 mention it nor does Euprecht in the Ochotsk flora, but Dall (1875, p. 166) speaks of 

 the " Bull-Head Kelp" at the Pribilof Islands, with the suggestion that it is Nereocystis. 

 It certainly extends as far north as Unalaska and may very likely range as far up as 

 the Pribilof group. 



Alaria praelonga Kjellm. ? Kjellman, Beringshafvets Algflora; 38, PI. 4, 1889. 



A few specimens of an Alaria were collected by Mr. Townsend in 1895, which 

 seem to belong to this species, although they have also the characters of A. angusta, 

 A. crispa, and even of A. lanceolata; in fact, it is very diificult for the writer to 

 determine how these four species differ essentially from one another. Euprecht also 

 mentions an Alaria as occurring at St. Paul (1851, p. 360), but without referring the 

 forms to any now recognizable species. (Bering Island.) 



