NO. 10 DAWSON : MARINE ALGAE, GULF OF CALIFORNIA 217 



specimens of C. simulans and C. Brandegeei are quite indistinguishable in 

 all respects. The latter name is based on a single, imperfect specimen from 

 La Paz, likewise the type locality of C. cervicorne. 



D. 439 from the south shore of San Esteban Island, February, seems 

 to be most like the C. Brandegeei type in all respects. Though diameter 

 relations are difficult to interpret in the dry specimens, part of this col- 

 lection grades into the more robust-appearing plants of D. & R. 3411, 

 3231 from Guaymas, December, 2926, Kino, November, and D. 109, 

 Turner's Island, January. These specimens were evidently dried slowly 

 and retained more of their original size and form. The dichotomous 

 branching is less regular than is common in the other specimens referred 

 to C. simulans, but the plants are not fully mature and in other respects 

 there is considerable similarity. 



D. 74, Guaymas, January, is another plant closely related here but 

 showing more divaricate branching. The terminal portions of the 

 branches are shriveled to slender proportions from rapid drying and give 

 the specimens a peculiar appearance. Young specimens present in the col- 

 lection resemble the type of C. cervicorne: D. 107, Turner's Island, D. 

 310, Gonzaga, D. 396, Tepoca Bay. Nothing short of a study of these 

 plants in the field will be able to establish them in their proper relation to 

 one another. 



Codium conjunctum S. & G. 



Setch. & Gard., 1924, p. 706, pi. 15, figs. 32, 33, pi. 32a. 



Specimens matching the type have not been rediscovered. This is a 

 small, caespitose species which in bearing slender branches is apparently 

 distinct from the others of the Gulf. 



J. 16, Tortuga Island, June. 



Codium amplivesiculatum S. & G. 



Setch. & Gard., 1924, p. 709, pi. 15, figs. 28, 29, pi. 35. 



The type specimen is highly distinctive in appearance from anything 

 else known. (See the general discussion of Codium.) 



J. 74 (AHF no. 67), floating in Pond Island lagoon, July. 



Codium longiramosum S. & G. 



Setch. & Gard., 1924, p. 710, pi. 15, fig. 27, pi. 37. 



The very long, unbranched, cylindrical segments set this specimen off 

 from any others known. (See general discussion of Codium.) 



J. 74b, floating in Pond Island lagoon, July. 



