318 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



Epiphytic on other algae: D. 561b, Agua Verde Bay, Feb.; D. 413a, 

 Pond Island, Feb.; D. 753, Turner's Island, July; D. 202, Puerto Re- 

 fugio, Jan.; D. 160, Tiburon Island, Jan.; D. 565b, Espiritu Santo 

 Island, Feb.; H. 618b, in 40 meters, San Jose del Cabo, Aug.; M. 87a, 

 Eureka, May. 



Ceramium horridum S. & G. 



Setch. & Card., 1924, p. 777, pi. 26, figs. 49, 50, pi. 79. 



This is one of the more easily distinguished Ceramium species in the 

 Gulf and may be identified by the figures of Setchell and Gardner. Be- 

 sides the several Gulf collections listed below, examples from the Galap- 

 agos Archipelago have been seen which correspond very well. 



D. 143, dredged in 4-32 meters, off the south end of Tiburon Island, 

 Jan.; D. 256, dredged in Mejia channel in 12-22 meters, Puerto Refugio, 

 Jan. ; D. 427, 430c, Pond Island, on shore, Feb. 



Ceramium codicola J. Ag. 



J. Agardh, 1894, p. 23. 



N. L. Gardner detected this species on Codium fragments dredged in 

 40 meters off San Jose del Cabo, H. 617, H. 644, August. Examples are 

 also on hand from San Bartolome Bay on the outer coast of Lower Cali- 

 fornia. 



Ceramium serpens S. & G. 



Setch. & Gard., 1924, p. 775, pi. 27, fig. 58. 



D. 199 and 201 on Laurencia, Puerto Refugio, January, correspond 

 in every way with the type specimen of this plant. The Setchell and 

 Gardner figures are well drawn and will serve with the description to 

 distinguish it. 



Ceramium procumbens S. & G. 



Setch. & Gard., 1924, p. 772, pi. 27, figs. 51-54. 



Growing on Gelidiurn, San Francisquito Bay, J. 27a, June ; J. — , on 

 Grateloupia, Isla Partida, July. 



This species has not again been collected. It seems to show many 

 features in common with C. serpens, and the distinctions between the two 

 are perhaps to be questioned. Additional comparative material will be 

 necessary, however. 



