[4 2 7] THE ALG^E 



midrib is 15-40 or more mm. broad, the central part inflated, and di- 

 vided by narrow septa into air vesicles of various lengths ; near the 

 base of the blade the septa become indistinct and then disappear, the 

 inflations also disappear some distance above the transition point ; the 

 stipe is short (5-10 cm. long), black, solid, and rounded at the base, 

 flattened above and gradually passing into the rachis, which is broad 

 and short; sporophylls very numerous, crowded, spatulate, elliptical 

 or obovate, rounded at the ends and narrowed below to a stipe of con- 

 siderable length (2-4 cm.) ; fruiting area covering nearly the entire 

 surface of the sporophyll. 



No complete specimens of mature plants were measured but many 

 fragments were cast ashore having a blade which measured 3-7 meters 

 in length and 4-10 dm. in width. 



De Toni l credits this species, on the authority of Dr. Anderson, to 

 California. Dr. Anderson informed the writer that he had seen no 

 specimens from the California coast and had no record of its occur- 

 rence there. He admitted that several of the Laminariaccce credited 

 in his list to the northern coast of California had been included in the 

 belief that they might occur there. 



Pleurophycus gen. nov. Setchell & Saunders. (Plate LII.) Plant 

 attached to the substratum by hapteres, consisting of a single un- 

 divided blade with one central distinct midrib; no perforations or 

 auricles at the base of the blade; stipe simple; muciferous canals 

 wanting ; fruiting area confined to the midrib ; sporangia and para- 

 physes as in Laminaria. 



Pleurophycus gardneri sp. nov. Setchell & Saunders. (Plate LII.) 

 Tilden's Am. Alg., No. 346. 



Blade broadly linear in outline, tapering below to the transition 

 point, 7-12 dm. and more long, 12-25 cm. wide, thin and soft, stri- 

 ate and " lung like," wrinkled or somewhat regularly pleated near 

 the midrib giving it a bullate appearance which disappears near the 

 base of the blade ; midrib broad (3-7 cm.) and flat, 2 mm. thick, 

 narrow above and below; stipe dark brown, drying black (3-7 dm.), 

 firm and solid, round below, much flattened above and gradually pass- 

 ing into the midrib ; sorus single, covering the upper part of the midrib. 



Yakutat Bay (236) ; Puget Sound (450). 



On June 26, 1899, on an island opposite the entrance to Yakutat Bay 

 the writer collected a few fragments of a plant washed up with several 



Syll.Alg. 3:322. 



