260 University of California Publications. [Botan-y 



guisk it. The mucilage ducts in the blade appear to be some- 

 what more abundant than in the preceding form, but arc not 

 very common even here. 



Laminaria digitata (L.) Lamouroux. 



Laminaria stenophylla Harvey. 



These species have been ci-edited to our territory by the older 

 writers, but it seems fairly certain that these species, as under- 

 stood at present, are not known from our limits with any certainty. 



Laminaria longicruris De la Pylaie. 



This species is mentioned by Postels and Rupi-echt (1840, 

 p. 10) as being rare in the Northern Pacific Ocean. It has not 

 been met with by any other writer. 



Laminaria cuneifolia J. Agardh. 



North Pacific Ocean, on the shores of Asia and America, 

 -/. G. Agardh (1867, p. 10); Popof Island. Alaska, Saunders 

 (1901. p. 429). 



We have seen the plant of Saunders, but do not feel certain 

 of the determination. The species seems to be distinguished 

 from L. saccharina ehieily by the mucilage ducts in the stipe, at 

 least as Agardh has described it. From Saunders's description, 

 his L. saccharina forma a (1901, p. 429), since it is said to have 

 mucilage ducts in both stipe aud blade, should be referred here. 

 It is given a range from the Shumagin Islands to Wrangell, 

 Alaska. 



Laminaria solidungula J. Agardh. 



In the sublitoral zone. Yakutat Bay, Kukak Bay, and Popof 

 Island, Alaska, Saunders (1901, p. 429). 



The present species has not occurred to us in the territory 

 covered in this account. We have supposed at several times that 

 we had discovered it, but the specimens have always proved to 

 be young plants of Oymaihmre triplicata, whose resemblance to 

 L. solidungula at this stage is often very striking. 



Laminaria longipes Bory. 



Agattu Island, Alaska, Townsend, No. 57G1 ! ; Kyska Island. 

 Alaska, Townsend, No. 5768! : St. Paul Island, Alaska, Buprecht 



