314 University of California Publications. [botany 



This is one of the most striking species of Rhodophycese 

 found on our American shores. When of full size, it is 40-60 cm. 

 long, and 15-20 cm. wide, more or less regularly perforated. 

 The tetrasporic plant is smooth and usually more ample than 

 the cystocarpic plant, which is covered with the dark, prominent, 

 medium-sized cystocarps. Some plants have peculiar prolifera- 

 tions from the margins and surfaces, which look like the stipes 

 of the adult plants. They have rounded tips when younger, but 

 later produce miniature blades. It is probable that they may, 

 under proper circumstances, grow into new plants. The perfora- 

 tions appear on any portion of the frond, new ones being 

 formed among the older ones. Their formation seems to be 

 accompanied by the destruction of tissue, probably much as in 

 Agarum as described by Humphrey (1886) . The morphology and 

 anatomy of this species have been treated somewhat superficially 

 by Butters (1899). He had only the cystocarpic plant. The 

 tetrasporangia are born in the subepidermal tissues and are 

 tripartite or cruciate. They are scattered irregularly over the 

 plant. 



Rhodymenia palmata (L.) Greville. 



On rocks in the upper sublitoral zone. Popof Island, Kukak 

 Bay, Prince William Sound, Yakutat Bay, and Glacier Bay, 

 Alaska, Saunders (1901, p. 436); Esquima.lt and the Strait of 

 Juan de Puca, B. ('.. Harvey (1862, p. 171). 



These references are evidently all to the f. typica, that of 

 Harvey probably mostly to subf. nuda, while those of Saunders 

 refer both to that subform and subf. marginifera. The speci- 

 mens examined by us have been referred to their proper subforms 

 as follows. 



Rhodymenia palmata f. typica subf. nuda Kjellmau. 



On stones in the lower literal and upper sublitoral zones. 

 Amaknak Island, Bay of Unalaska, Alaska, W.A.S. and A.A.L., 

 Nos. 3264! , 5000! , and in Collins, Holden and Setchell, P. B.-A., 

 No. 936!; Karluk, Kadiak Island, Alaska, W.A.S. , No, 5064!; 

 I'yak Bay, Kadiak Island, Alaska, W.A.S. and A.A.L., No. 

 5079b! 



