1925] SetcheU-Gardner : Melanophyceae 641 



present. At first we were inclined to place the broad Californian plant 

 under A. praelonga Kjellman, being led thereto partially by the 

 opinion of Kjellman, who stated in a letter that one of our plants 

 greatly resembled his Alariai praelonga but differed in the shape of 

 the blade. The blade in our plants is, at times, much nearer in shape 

 to that of A. praelonga than are the sporophylls. 



Alaria marginata Post, and Rupr., as shown by the type, has a 

 short stipe, crowded with broad but rather short sporophylls, and a 

 long broad blade, long attenuate at the base. The midrib seems to vary 

 from narrow to very broad. 



5. Alaria Pylaii (Bory) Grev. 



Stipe 2-4: cm. long, terete ; rhaehis flattened, about twice the 

 diameter of the stipe, passing directly into the midrib ; blade short 

 and broad, with broadly cuneate or truncate-cordate base, 2.5-3.5 dm. 

 long, 1-2 dm. wide, thin, membranaceous ; midrib 5-8 mm. wide ; sporo- 

 phylls 16-24 in number, 8-10 cm. long, 2-4 cm. wide, obovate, with 

 slender pedicels. 



Growing on stones in the upper sublittoral belt, in the vicinity of 

 Prince William Sound and Kadiak Islands, Alaska. 



Greville, Alg. Brit. Syn., 1830, p. xxxix ; Setchell and Gardner, 

 Alg. N.W. Amer., 1903, p. 272; Setchell, Kelps of the U. S. and 

 Alaska, 1912fl., p. 162. Agarum Pylaii Bory, in Diet, class, d'hist. nat., 

 vol. 9, 1826, p. 194. (Neither Alaria Pylaii J. Ag. nor A. Pylaii Yendo.) 



The type locality of this species is Newfoundland and the type 

 specimen is in the Herbarium of the Museum of Paris, and is labeled, 

 Laminaria Pylaii. It was collected by De la Pylaie in 1817. The 

 specimen is evidently an old one, more or less battered, and has some- 

 what broader sporophylls than the measurements given above, other- 

 wise our specimens from Orca agree fairly well with the type and 

 until more data can be obtained from field study we are placing our 

 plants somewhat doubtfully under this species. 



The type of Agarum Pylaii Bory in Herb. Bory shows a plant with 

 a short stipe, thickly placed, short but broad sporophylls, and a 

 broad blade, broad to even cordate at the base. Our specimens agree 

 sufficiently to be considered a geographical variety of this species. 



