262 Puget Sound Marine Sta. Pub. Vol. 1, No. 25 



As far as available literature shows this is the first station in which 

 Agarum crihrosum has been reported south of Alaska. Professor Setchell 

 informed me that this is farther south than any locality from which he 

 has been able to examine specimens. 



Forming dense zones on nearly vertical ledges about one to four meters 

 below low tide line on the east end of Minnesota Reef, Pear Point, and 

 Eagle point, all on San Juan Island ; Canoe Island ; dredged in 5 fathoms 

 in Kansas Cove. Muenscher (8), p. 61, pi. 10, (9). 



2. Agarum fimbriatum Harv. Coll. Alg. N. W. Coast, p. 166. Fig. 13 

 Holdfast of many branching hapteres ; stipe two to ten cm. long, flat- 

 tened, fimbriate, often with hapteres along the edges ; blade about one 

 meter long, crinkly, sparingly perforated ; midrib about two cm. wide, 

 running to the tip of the oblong blade. 



Common on stones and rocks in the upper sublittoral zone. 



9. PLEUROPHYCUS Setchell & Saunders 



1. Pleurophycus Gardneri Setchell & Saunders, Saunders in Wash. 

 Acad. Sci. 3: p. 427, pi. 52. Fig. 14 



Holdfast of several whorls of stout branching hapteres ; stipe three 

 to seven dm. long, solid, terete at the base, much flattened above and grad- 

 ually passing into the broad midrib ; blade broad, linear or oblong in out- 

 line, tapering below, seven to ten dm. or more in length, 12 to 50 cm. in 

 width, thin and soft, wrinkled or somewhat regularly pleated near the 

 midrib ; midrib three to twenty cm. wide, flat, narrow above and below. 



On rocks in the upper sublittoral zone where the currents are swift. 



10. COSTARIA Greville 



1. CosTARiA cosTATA (Turner) Saunders, Bot. Gaz. 20: p. 57, 1895; (Cos- 

 taria Turneri Post. & Rupr., Illustr. Alg.) Fig. 15 



Holdfast of branching hapters; stipe short, flattened, without mu- 

 cilage ducts ; blade broad, with five or rarely three longitudinal ribs pro- 

 jecting on one side only and alternating on the two surfaces, bullate and 

 sometimes perforated, from one to two meters long, the end usually torn 

 away. 



Common in the upper sublittoral and sometimes in the lower littoral 

 zone. 



11. LAMINARIA Lamouroux 



Plant consisting of holdfast stipe and blade; holdfast of branched 

 hapteres; stipe well developed, terete or compressed, solid; blade without 

 midrib, entire or split longitudinally, smooth or with several rows of folds. 



