NO. 10 DAWSON : MARINE ALGAE, GULF OF CALIFORNIA 257 



This species, with its enlarged basal cell and long, slender, free 

 filaments, does not correspond to any known described plant. The pecu- 

 liar, partly embedded basal cell and the basal branching habit together 

 with its very slender diameter distinguish it clearly. 



Family Bonnemaisoniaceae 



Genus ASPARAGOPSIS Montagne 

 Asparagopsis Sanfordiana Harv. 



Harvey, 1855, p. 544; 1858-63, pi. VI. Asparagopsis Sanfordiana f. am- 

 plissima S. & G., 1924, p. 760, pi. 22, fig. 3, pi. 41. 



Abundant material of this widely distributed Pacific species was taken 

 from a dredge-haul in Mejia channel, Puerto Refugio, 12-22 meters, D. 

 268, January. 



A comparison of the material from the Gulf, including the rather poor 

 specimens of Marchant's collection from Eureka, does not indicate to the 

 author sufficient difference to merit the retention of the suggested name 

 given above in synonymy. Examples seen from the coast of southern Cali- 

 fornia likewise seem to correspond well with the typical species as figured 

 by Harvey (1858, pi. VI). There may, however, be some query regard- 

 mg the application of the same name to all of the Pacific plants which 

 have been considered to belong here, since Harvey's type from Australia 

 has not been re-examined and verified so far as can be determined. The 

 gross morphological nature of our plants is, nevertheless, so distinct that 

 they need not be confused with any other Pacific coast algae. 



Family Ghaetangiaccae 



Genus SCINAIA Bivona 

 Scinaia Johnstoniae Setchell 



Setchell, 1914, p. 97, pi. 11, figs. 14, 15. Scinaia furcellata var. undulata 

 Howe, 1911, p. 502 (not Ginannia undulata Mont.). 



Scinaia Johnstoniae is a sublittoral plant recorded thus far from 

 southern California, the outer coast of Lower California, and from sev- 

 eral stations in the Gulf. It is the only cylindrical, nonconstricted species 

 known on our Pacific coast. 



D. 235, cast up, Puerto Refugio, Jan.; D. 137, dredged, 4-12 m., 

 off Tiburon Island, Jan.; D. 50, dredged, 4-6 m., Guaymas Bay, Jan.; 

 D. 281a, dredged 12-22 m., Mejia channel, Puerto Refugio, Jan.; J. 46, 

 dredged, Los Angeles Bay; J. 106, San Pedro Martir Island; J. 114, San 

 Esteban Island. 



