258 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



Scinaia latifrons Howe 



Howe, 1911, p. 500, fig. 1, pi. 28; Setchell, 1914, p. 102, pi. 11, fig. 23. 



Scinaia latifrons is the broadest and most differentiated of the com- 

 planate species of the genus. The figures given by Howe are sufficient to 

 distinguish it immediately. It has been recorded sparingly from the outer 

 coast of the Californias, but in the Gulf seems to be very abundant in 

 certain sublittoral localities. S. Johnstoniae often grows with S. latifrons 

 in the same sublittoral habitats. 



D. 82, dredged, 12-20 m., outside Guaymas Harbor, Jan.; D. 136, 

 dredged, 4-32 m., off Tiburon Island, Jan.; D. 277, dredged, 12-22 m., 

 in Mejia channel, Puerto Refugio, Jan.; M. 53, 57, cast ashore, Guay- 

 mas ; Vives, La Paz. 



Genus GALAXAURA Lamouroux 

 Galaxaura fastigiata Dec'ne 



Kjellman, 1900, p. 64, tab. 9, figs. 1-3, tab. 20, fig. 4; Tanaka, 1936, p. 

 157, fig. 20. 



Only two sterile specimens of this widely distributed Pacific species 

 have been taken, both in beach-drift. 



J. W. Durham, at Red Bluff Point, Tiburon Island, Dec. 2, 1940; 

 Poindexter, at Punta Penasco, March, 1941. 



The specimens are cylindrical, smooth, and light pink to greenish in 

 color. They fall in the generally recognized subgroup Eugalaxaura. 



Galaxaura marginata (Solander) Kjellm. 



Kjellman, 1900, p. 77, tab. 20, fig. 44. Corallina marginata Solander, in 

 Ellis & Solander, 1786, p. 115, tab. 22, fig. 6; B0rgesen, 1915, 

 p. 106, figs. 115-117, pp. 458-459. 

 A single imperfect example, which seems nearest to the West Indian 

 species Galaxaura marginata^ was dredged in 40 meters at San Jose del 

 Cabo, H. 601, August. It was so determined by N. L. Gardner. The per- 

 ipheric assimilating cells are broadly rounded. No apiculae such as B0rge- 

 sen illustrates have yet been observed. 



Family Gelidiaceae 



Genus GELIDIUM Lamouroux 



Gelidium pusillum (Stack.) Le Jolis (in extenso) 



Plate 42, Figs. 1-6 



Le Jolis, 1863, p. 139; Feldmann & Hamel, 1936, p. 236, figs. 19, 20; 



B0rgesen, 1920, p. 280, fig. 26. Fuciis pusillus Stackhouse, 1801, 



tab. 6. Fucus caespitosus Stackhouse, 1801, tab. 12. 



