NO. 1 TAYLOR: PACIFIC MARINE ALGAE 127 



Mexico: Is. Revilla Gigedo, intertidal on rocks, Sulphur Bay, I. 

 Clarion, nos. 39-9, 39-10, 16 Mar. 1939. Costa Rica: intertidal on 

 rocb, Puerto Culebra, no. 34-538A, 24 Apr. 1934. Panama: from 

 rocks in surf near high tide line in a cove, Islas Secas, no. 39-122, 26 Mar. 

 1939. 



Oscillatoriaceae 



HYDROGOLEUM Kiitzing ex Gomont, 1892 



Hydrocoleum comoides Gomont 



Drouet 1936, p. 23, fig. 7. 

 Mexico : I. Soccoro, I. Clarion. 



Hydrocoleum can tharidosmum (Montagne) Gomont 



Drouet 1936, p. 24, fig. 9. 

 Mexico: Ba. Tangola-Tangola. 



Hydrocoleum lyngbyaceumi Gomont 



Tilden 1910, p. 135, pi. 5, fig. 58; Taylor 1928, p. 43, pi. 1, fig. 17; 

 Fremy 1939, p. 19. 



Plant a black or dark-greenish gelatinous stratum on rocks and larger 

 plants in clean marine locations, between or just below tidemarks, the 

 upper portions extending in tongues and waving free in the water, the 

 filaments parallel or somewhat entangled, the sheaths hyaline, gelatinous, 

 soon diffluent, the trichomes several within a sheath in older filaments, 8- 

 16 /A broad, the cells short. 



Mexico: Nayarit, on mud in a shallow pool beyond the surf, I. 

 Maria Magdalena, Las Tres Marias, no. 39-640, 9 May 1939. 



MICROGOLEUS Desmazieres ex Gomont, 1892 

 Microcoleus tenerrimus Gomont 



Drouet 1936, p. 24, figs. 11, 12. 

 Ecuador : I. Fernandina. 



SYMPLOGA Kiitzing ex Gomont, 1892 

 Symploca hydnoides Gomont 



Tilden 1910, p. 129; Fremy 1939, p. 22. 



Plant a black, blue-green, or violet slimy or gelatinous-pannose 

 stratum on rocks or other algae between or just below tidemarks, the 

 lower filaments straight or flexuose, parallel or much intertwined, the 

 upper filaments parallel and agglutinated into fascicles up to 5 cm long, 



