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ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



The leaves of these plants are less consistently coarsely dentate than 

 figured by Agardh, the lower especially, but on the whole they agree with 

 his description and figures. They agree more closely with type material 

 which the writer was allowed to compare at the Agardhian Herbarium 

 in Lund, and cotype material in the Field Museum of Natural History. 



Mexico: Nayarit, on surf-beaten rocks of I. Maria Magdalena, Las 

 Tres Marias, no. 39-632, 9 Mar. 1939. Guerrero, littoral rocks at Ba. 

 Petatlan, no. 34-566, 2 Mar. 1934. Oaxaca, rare in the drift at Ba. 

 Tangola-Tangola, no. 34-559, 28 Feb. 1934. Panama: From rocks 

 near low water mark, Bahia Honda, no. 39-129 A, 26 Mar. 1929. 



Sargassum Skottsbergii Sjostedt, prox. 



Sjostedt 1924, p. 311, text-figs. 1-5. 



Farlow's record of S. graminifolium J. Ag.f (1902, p. 92) from 

 Wenman L is based on a specimen in the Stanford University herbarium 

 which is annotated by Setchell as S. Skottsbergii Sjost. ( ?) forma. This 

 has longer and narrower leaves than the plants I have tentatively assigned 

 to the same species. 



Ecuador: Salinas, Schmitt no. 500 A, 12 Sept. 1926. 



Sargassum Brandegeei Setchell & Gardner? 



Setchell & Gardner 1924, p. 736, pi. 21, fig. 79. 



These specimens were few and the determination somewhat uncertain. 

 At Wenman L basal parts were not available, and only the fruiting tops 

 were secured. The leaves, which occasionally forked once, are very deeply 

 serrate, the teeth often bifid. Cryptostomata are few and obscure. The 

 vesicles occasionally show a ridge near the stalk and, while they are gen- 

 erally smooth on the end, do in rare cases show a minute subfoliose tip. 



Costa Rica: rare as floated ashore at Golfo Dulce, no. 39-102, 26 

 Mar. 1939. Ecuador: Archipielago de Colon, drifted ashore on L 

 Wenman, no. 34-81, 11 Jan. 1934. 



Sargassum pacificum Bory 



Setchell 1937b, p. 145; probably Grunow in Piccone 1886, pp. 49, 

 50 under S. lendigerum v. foliosa i. subdelicatula, f. rigidiuscula and v. 

 furcifolia. 



