206 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



liquid, and the internal structure of the cells cannot satisfactorily be 

 studied. The wide extension in the distribution of this tropical Austral- 

 asian species must, therefore, remain tentative. 



D. 599, growing in shaded places on coral heads in shallow lagoon and 

 in oyster-culture ponds, San Gabriel Bay, Espiritu Santo Island, Feb. 



Genus CLADOPHOROPSIS B0rgesen 

 Gladophoropsis robusta S. & G. 



Setch. & Gard., 1924, p. 714, pi. 13, fig. 16. 



J. 135, growing on rocks in the upper sublittoral, Tortuga Island, 

 June. Not again collected. 



According to Setchell and Gardner, this species may readily be dis- 

 tinguished from all other known species of Gladophoropsis by the large 

 diameter and by the great length of the segments between the branches. 



Genus VALONIOPSIS B0rgesen 

 Valoniopsis pachynema (Martens) B0rg. 



B0rgesen, 1934, p. 10, figs. 1, 2. Valonia confervoides Harvey, Alg. Cey- 

 lon Exsicc. no. 73 (nomen nudum) ; J. Agardh, 1887, p. 100. 

 Bryopsis pachynema Martens, 1866, p. 24, pi. IV, fig. 2. 



Comparison of our specimens was made with an original specimen of 

 Martens' collection from Sumatra in the Herbarium of the University of 

 California. The correspondence is remarkably close, especially with D. 

 214. B0rgesen's description also conforms satisfactorily to our plants. 



The species is widespread in the Gulf and moderately common on 

 middle and lower littoral rocky shores. Collections have been made in 

 both winter and summer, the plant apparently tolerating a considerable 

 range of temperature. It is known from warmer seas in many parts of the 

 world. 



D. 682, south shore of Tiburon Island, July; D. 126, Turner's 

 Island, Jan. (young specimens) ; D. 694, July (mature specimens) ; D. 

 614d, occasional in oyster-culture ponds, San Gabriel Bay, Feb.; D. 71, 

 Guaymas harbor, Jan. ; D. & R. 3236, cave north of Cabo Arco, near 

 Guaymas, Dec; D. 217, Puerto Refugio, Jan. 



In the winter collections it is peculiar that the specimens were usually 

 found associated with a small species of sponge. 



