VOL. 5] Notes on Alger. 123 



they came from either Bering Island or Sitka. The writer has 

 seen yonng specimens, seeming to be this species, from the Pacific 

 shores of Alaska, but they were not characteristic and he does 

 not feel certain that they really belong here. 



This species seems to be the Hafgygia Bongardiana f. subsessilis 

 of Areschoug (Obs. Phyc, IV, p. 5) as far as one can tell from a 

 description. Areschoug especially mentions the conglobated 

 hapteres and the root-stocks emitting leaves from their apices, so 

 characteristic of our plant. 



PLEUROPHYCUS gen. nov. Laminaceariim, Setchellet Saun- 

 ders tnss. Frond Laminarioid, with evident holdfast, stipe and 

 blade, the lamina provided with a single, percurrent, median, 

 shallow midrib-like furrow (prominent on one surface and 

 indented on the other), without perforations or auricles. 



Pleurophycus Gardneri Setchell et Saunders mss. Holdfast 

 of two or three whorls of more or less irregularly dichotomously 

 branched, fairly stout hapteres. Stipe about 35 cm. in length, 

 terete at the base, becoming decidedly flattened above, with medul- 

 la elliptical in cross-section above, and without mucilage ducts. 

 Blade 70 to 100 cm. long, and 20 to 25 cm. wide in the middle 

 portion, more or less wedge-shaped at the base, "midrib" about 

 3 cm. in width, and margins more or less ruffled or even, at times, 

 conspicuously reticulately rugose. The blade is thin, with pro- 

 portionately wide medullary layer and frequent, large mucilage 

 ducts. Sorus confined to the midrib portion, on both surfaces of the 

 blade, extending at times from the base to near the apex. Para- 

 physes and sporangia similar to those of species of Laminaria. 



First found by N. L/. Gardner, in the summer of 1898, on the 

 shores of Whidby Island, Wash, and by Miss J. E. Tilden, on San 

 Juan Island, Washington; from both of which places, the writer 

 has seen specimens. It has been found, also, at Yakutat Bay, 

 Alaska, by De Alton Saunders. It seems to grow in the upper 

 part of the sublittoral zone in exposed localities. 



Iridzea oblongifructa Setchell mss. Frond ample, up to 5 or 

 6 cm. in length, cuneate at the base, narrowed into a short flat- 

 tened stipe, and attached by a fairly couspicious fleshy disk, from 

 which several fronds may spring; color deep red ; substance soft 



