NOTES ON KELPS. 45 



Harvey in Hooker's Flora Antarctica (2; 460, 1847) and 

 again in the Nereis Boreali- Americana (Part 1; 87, 1858), 

 where Harvey says that the species must remain without a 

 description, is the Laminaria saccharina of Harvey in 

 Hooker and Arnott's Botany of Beechey's Voyage (p. 407, 

 1841). De Toni, however, places the Lessonia Sinclairii 

 Harv. among the " species inquirendae " quoting the refer- 

 ence to it from J. G. Agardh (Species Alg., 1; 152, 1848). 



Laminaria Sinclairii is very common about San Francisco, 

 extends north into Behring Sea (Kyska and Agattu Islands) 

 and southward as far as Monterey where it is still common. 

 The writer failed to find it growing at Port Harford in a 

 hasty trip about the shores on Jan. 11, 1896, although several 

 specimens were found thrown ashore. Very careful search 

 failed to discover it about San Pedro or Redondo either 

 growing or cast ashore and Mr. Cleveland does not report it 

 from San Diego. It must be classed for the present at least 

 with those species whose southern limit is north of Point 

 Conception. 



Laminaria Sinclairii shows certain peculiar phenomena 

 at the time of the renewing of the blade, which may perhaps, 

 when they are carefully investigated, throw considerable light 

 upon this peculiarity in the other species of the genus 

 Laminaria. Dr. Anderson and the writer have noticed for 

 several years the existence of certain peculiar " collars " at 

 the tips of the stipes into which the blades seemed to fit. 

 Areschoug must have noticed them too for he says; "Folium 

 basi a trunco quasi vaginatum" (Obs. Phyc, Part 4; 6, 1883) 



At certain times these collars are very noticeable projecting 

 up around the base of the blade for about a quarter of an 

 inch. As the stipe increases in length by new growth at its 

 apex the collars are left behind and gradually wear away. 

 From specimens collected at Fort Point, San Francisco by 

 the writer, in December 1895, it is shown that after the rest- 

 ing period, during which the reproductive organs are formed, 

 is finished, there comes into being a renewed activity of 

 the meristematic tissues at the "transition-place" between 

 tipe and blade. Furthermore, it is shown that this meris- 

 stematic activity does not extend to the outer tissues of the 



