NO. 1 TAYLOR: PACIFIC MARINE ALGAE 91 



Glossophora galapagensis Farlow 

 Plate 11, Figs. 1,2 



Plants tufted, to 35 cm tall, blackish brown below, yellowish brown 

 near the tips; the base a little stupose and the stems of the older plants 

 near the base with many slender entangled decurrent proliferations which 

 supplement the holdfast ; irregularly dichotomous at intervals of 2-5 cm, 

 the segments linear, slightly widened at the forks, the sinuses narrowly 

 rounded, the Branches erect, with little narrowing between the base of 

 the plant and the upper segments, the greatest width above a fork being 

 3-5 mm, the terminal segments (except for small proliferations) 2-3 mm 

 diam., the margins regularly but sparsely beset with small spinose teeth 

 0.3-1.0 mm long at intervals of 2-7 mm, but these obsolete on the oldest 

 segments ; apices obtuse to emarginate, showing growth from a prominent 

 apical cell; structurally showing in the midportion of the plant a single 

 cortical, a single subcortical and one or two medullary layers in section ; 

 oogonial sori of a very few cells scattered over the surface ; minute leaflets 

 abundant over the surface of the older plants. 



These handsome plants are much larger than the species as defined 

 by Farlow. His statement at the end that the spines (spinose teeth) are 

 24-32 mm long is certainly a misprint. Whatever may be their taxonomic 

 value, it surely looks as if the little leaflets on the face of the thallus devel- 

 oped, in this species, from sorus rudiments, replacing the eggs; they 

 quickly assumed a growth based on the typical apical cell. Somewhat 

 similar proliferations are not rare in Dictyota and Padina. Were it not 

 for the structural differentiation, producing a distinct subcortical layer 

 which is intermediate in cell size between the surface cortical layer and 

 the medulla, it would be hard to separate this genus from Dictyota. The 

 specimens underlying Farlow's record (1902, p. 90) from Turtle Ft., I. 

 Isabela, which the writer has seen, are small and slender individuals not 

 typical of what this plant may develop into. 



Ecuador : Archipielago de Colon, intertidal on the reef to the north 

 of Tagus Cove, I. Isabela, no. 34-165, 13 Jan. 1934. Ibid., dredged 

 from 5.4-7.2 meters' depth at Academy Bay, I. Santa Cruz, Schmitt tio. 

 51B-33, 4 Feb. 1933. Ibid., occasional in the lower littoral near Black 

 Beach Anchorage, I. Santa Maria, no. 34-211, 17 Jan. 1934. 



SPATOGLOSSUM Kutzing, 1843 



Plant foliaceous, the segments pinnate to palmate, the margin entire 

 or sparingly dentate; midrib lacking, or rudimentary near the base of the 

 main segments; growth from a small group of initial cells at the apex; 

 reproductive cells scattered. 



