250 University of California Puhlicaiions . [botanv 



in tlie inner cortex, one-tliird to oue-half way between the i)er- 

 iphery and the medulla. No. 275 is a plant referred to Eisenia 

 arhorea by Saunders, a specdes not seen by us north of the central 

 coast of California. 



Laminaria Ruprechti (Areschoug) DeToni. 



Sitka, Alaska, Eiiprecht, (fide Areschoug, 188.'J, p. 4j. 



The proposer of this species had only a single specimen, and 

 as far as we know, there have been no others found, or at least, 

 identilied. In looking over the description, we feel that it may 

 be that L. Ruprechti is the same as our L. l)uUat<t f. cidieata, ])ut 

 since we have no opportunity of consulting the type-specimen, 

 we must leave the disposition of our forms as given. 



Laminaria fissilis J. Agardh. 



This species evidently was founded on the L. digitata f . parfita 

 Postels and Ruprecht (1840, p. 10), a Kamtschatkan plant. The 

 proposer says also that it includes the L. deriuatodea of Harvey's 

 List. From this, it appears that it occurs also <>ii the shores of 

 Vancouver Island at the Strait of Juan de Fuca. There seems 

 to be some difference of opinion as to the occurence of mucilage 

 ducts in the stipe. Kjellman says (1883, p. 236) that the stipe 

 lacks these structures, while Rosenvinge (1894, p. 88) says that 

 they are usually present in one or two circles. We have never 

 seen any specimens certainly belonging to this species, but we sus- 

 pect that we have forms of it under L. hit I lata. The latter 

 species, however, has bulla? on the blade, which are not mentioned 

 in any description of L. fissilis. 



Laminaria nigripes J. Agardh. 



Kjellman (1889, p. 45) has found this species on Bering 

 Island, Siberia, and represented by several forms. We have 

 not been able to determine exactly whether this species occurs in 

 our territory or not, but we suspect that future study and 

 comparison may result in transferring some, if not all, of the 

 forms credited by us, and perhaps also by other authors, to the 

 following species, from it to this one. They all differ from the 

 descriptions of L. nigripes, however, in having bulla^ on the 

 blade. 



