130 University of California Fublications in Botany [Vol. 6 



Gloiophloea, viz., Gloiophloea undulaia. On the California coasts the 

 plants usually referred to Scinaia furceUata and resembling it in 

 habit are not strictly of the genus Scinaia. One is Gloiophloea confusa 

 while the other is Pseudoscinma Snyderae. Three species of Scinaia 

 are credited to the Californian coast in the present account : one is 

 Scinaia latifrons, a broad, flattened species; another is Scinaia articii- 

 lata, a regularly constricted species; while the third, Scinaia Jolin- 

 stoniae, is a robust species of entirely distinctive utricular structure, 

 so that none of these can be considered as being closely related to 

 Scinaia furceUata. 



The Japanese Scinaia furceUata has been found to consist of two 

 species, Scinaia japonica, quite distinct from the European plant, 

 while the other is Gloiophloea Okamurai of the present account. 



The nature of the plant referred to Scinaia furceUata from the 

 Hawaiian Islands must remain unsettled for the present. It is referred 

 to by Harve}^ (1846, p. 69 (text) and 1863, p. xxxviii). No uncon- 

 stricted, cylindrical Scinaia-like plant has occurred to me among the 

 extensive collections of marine algae from the Hawaiian Islands in 

 my possession. On the other hand, Scinaia hormoides, a regularly 

 moniliformly constricted species, closely related to Scinaia moniliformis 

 of Australia, does occur there. It does not seem probable, however, 

 that this is the plant referred to by Harvey. 



The result, then, is that Scinaia furceUata, instead of being a nearly 

 cosmopolitan species, is found to be restricted to a fairly wide but 

 natural area, through which it might readily spread and with tempera- 

 ture limits between 15° and 25° C, being mostly between about 18° C 

 and 25° C, a not altogether unusual temperature range for a member 

 of the Florideae. 



Attention may now be called to the accompanying table (p. 131) 

 showing the distribution of the various members of the Scinaia 

 assemblage as they are limited and established in the present paper. 

 In the table an x indicates established range and an indicates a range 

 previously reported but shown above to be erroneous. 



The northern Atlantic Ocean has three species in two genera, the 

 southern Atlantic, if we count South Africa as Atlantic, as well as 

 perhaps also of Indian Ocean, has two species in two genera, if we 

 count South Africa as exclusively of the Indian Ocean in its algal 

 affinities, which is perhaps more natural, it has none. The north Pacific 

 Ocean, on the other hand, has nine species in three genera, and the 

 south Pacific Ocean has four species also in three genera; or the whole 



