112 University of California Publications in Botany [Vol. 6 



The type of the genus is Gloiophloea Scinaioides J. Ag. of Aus- 

 tralia, of which I liave not had the opportunity of examining the type 

 specimen ; but I have had the privilege of examining a New Zealand 

 specimen collected by Berggren, w^hicli seems clearly to be Agardh's 

 species. The statements made above, as to the structure and relation- 

 ships of Gloiophloea, are justified by a study of this specimen which 

 is in Herb. Far low. 



This species of GloiopJiloea, like those of Scvnaia and also those of 

 the new" genus Pseudoscinaia, to be proposed later in this paper, 

 resemble one another and those of the other two genera. From my 

 examination of the material available, I have been convinced that 

 there are five species, possibly even six, but the technical points of 

 distinction are not completely satisfactory. The main distinction 

 separating the species into two groups is whether the species are 

 monoecious (three or four species) or dioecious (two species). This 

 separation seems to rest on a basis that is constant and readily to be 

 determined. Within each group the thickness of the cortex presents 

 seemingly constant differences which are associated with less tangible 

 differences in general appearance and with geographical segregation. 

 I have, as will be seen from the analytical keys to species given farther 

 on, used it as a main character for separating the species. A study 

 of larger suites of specimens and in the living condition will, I feel 

 certain, add to the list of differences. 



Gloiophloea Scinaioides J. Ag. 



Plate 15, fig. 48. 



J. G. Agardh., Bidr. Florid. Syst., p. 29, 1870, Spec. Alg., vol. 3, 1, p. 510, 



1876, Florid. Morph., pi. 28, figs. 1-5, 1879; 

 J. Bracebridge Wilson, Proe. Roy. Soc. Victoria, new ser., vol. 4, p. 173, 



1892; 

 De Toni, Syll. Alg., vol. 4, sect. 1, p. 107, 1897. 



Scinaia furcellata Harvey, Phycologia Australica, vol. 5, p. xxxviii, 1863 (in part, 

 at least as to specimen from Western Port); 



J. G. Agardh., De Alg. Nov. Zel. Mar., p. 26, 1877 (in part?); 

 Laing, Trans. N. Z. Inst., vol. 34, p. 348, 1901 (at least in part). 



Plant up to 8 cm. high, 12-15 times dichotomous, fastigiate, cylin- 

 drical, continuous, 1.5-2 mm. broad (?), soft, deep red; axis obscure; 

 cystocarps scattered ; — axis broad of loosely intertwined large thin 

 walled filaments accompanied by numerous longitudinal and oblique 

 slender thick w'alled corticating filaments more or less intertwined ; 

 adult outer cortex 85-110/a thick, the outer portion 65-85/i, thick, of 



