NO. 1 TAYLOR : PACIFIC MARINE ALGAE 129 



Lyngbya confervoides Gomont 



Tilden 1910, p. 119, pi. 5, fig. 39; Taylor 1928, p. 44, pi. 1, fig. 20; 

 Fremy 1939, p. 29. 



Plant a blue-green or blackish stratum or cushion on rocks and wood 

 between tidemarks, the filaments prostrate in the lower strata, free above, 

 the sheaths hyaline, thin at first, becoming thick and lamellose in age, not 

 coloring blue when treated with chlor-zinc-iodine, the trichomes blue 

 green to violet, 10-30 fi broad, not constricted at the crosswalls, the cells 

 very short, the crosswalls granulated, the end cells rounded, their outer 

 membranes not at all or only slightly thickened. 



Panama : in hot high tide pools in a cove, Is. Secas, no. 39-137 j 26 

 Mar. 1939 ; in the higher tide pools on an islet on the south side of Bahia 

 Honda, no. 39-135, 26 Mar. 1939. 



Lyngbya gracilis Rabenhorst, v. monilis (Setchell & Gardner) Drouet 



Drouet 1936, p. 25, fig. 2. 



Mexico : I. Soccoro, I. Clarion. Costa Rica : Puerto Culebra. 



Lyngbya semiplena Gomont 



Tilden 1910, p. 118, pi. 5, fig. 38; Drouet 1936, p. 26, fig. 13; Fremy 

 1939, p. 29. 



Plant a blue-green or brownish pannose or thick-gelatinous stratum 

 on rocks and wood between tidemarks, or a yellowish floccose mass in 

 quiet brackish water, the filaments prostrate at the bases, free toward 

 the tips, the sheaths hyaline, thin at first, becoming thick and lamellose in 

 age, not coloring blue when treated with chlor-zinc-iodine, the trichomes 

 5-12 II broad, not constricted at the crosswalls, the cells short, the cross- 

 walls granulate, the outer membrane of the end cell thickened and 

 rounded or obtuse conical. 



Mexico: Baja California, with Dermocarpa on wharf pilings, fish- 

 ing settlement, southeast side of I. Cerros, no. 39-2, 14 Mar. 1939; also 

 I. Clarion. Costa Rica : intertidal on rocks, Pt. Parker, no. 39-82, 24 

 Mar., 1939. 



Lyngbya versicolor (Wartmann) Gomont 



Drouet 1936, p. 26, fig. 6. 

 Ecuador: I. Isabela. 



