592 THE FUR SEALS OF THE PRIBILOF ISLANDS. 



agrees thoroughly with the descriptious of Agaidh aud of Areschoug (1883), especially 

 with that of the latter, is the same as Kjelluiaii's. The plaut was well kuowii to 

 Ruprecht (1851, 232 and 351), who has giveu it two additional names, Laminaria 

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

 Our plant, however, is certainly uot 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 

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

 species until an iuvestigatiou into the character and distribution of the rauciferous 

 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 X. japonica and L. rodriqnezii (of. Boruet, 1888, p. 2), besides the species 

 mentioned. Bornet mentions (1. c, p. 2) also /y. bongardiana, but the writer has uot 

 seen any specimens of tliat 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 iSnodgrass, but the specimens are all 

 sterile. (Bering Island.) 



Laminaria digitata is credited by Uuprecht to St. I'aul, 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 turner! P. aud. K. Kuprocht, Tangts Och. ; 214, 1851. KJelliuau, Beriugsbafvets Algflora; 

 12, 1X89. 



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

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

 Bay; St. Lawrence Island.) 

 Thalassiophyllum clathnis (Gmol.) P. aud K. Kjellman, BeringsbatVots Algflora; 42, 1889. 



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

 Island, one of which is in Herb. Eaton 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. and K. 



Thisspeciesis unknown with certainty from the Bering Sea. Kjellmann does not 

 mention it nor does Kuprecht in the Ochotsk flora, but Dall (1875, p. 160) 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. ? Kjellmau, Beringsbafvcts Algtlora; 38, PL 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 difficult for the writer to 

 determine how these four species differ essentially from one another, Ruprecht also 

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

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



