Butters: liagora and galaxaura. 177 



ical, the superficial flattened obconical, with a slightly convex base, 

 or even lenticular, 16-20 mic. in diameter. The external filaments 

 are of two kinds, one unbranched, about 300 mic. long, composed 

 of cells 23-30 mic. long and 15-16 mic. wide, the other longer, 

 rhizoid-like, and often branched. 



Galaxaura intricata Kjellman. Om Floride-Slagtet Galax- 

 aura. 57. 1900. 



Frond growing by paired proliferations are very briefly stipi- 

 tate, continuous, more or less frequently forked, at first glabrous, 

 lightly annulately constricted, submembranaceous, collapsing, after- 

 wards very shortly and densely hirsute, solid, distended, the lowest 

 at length somewhat glabrous, subfarinaceous ; peripheral filaments 

 arranged in no particular order, some straight, simple, short, about 

 300 mic. long, others rhizoid-like, often branched, elongated ; inter- 

 nodes barely 1 mm. thick, about 4 mm. long, not transversely plicate 

 at the base, the upper cylindraceous-obconical, the lower cylindra- 

 ceous. 



Hanalei, Kauai. June 23, 1902. (U. S. Fish Com.) Dia- 

 mond Head, Oahu. May 7, 1895. (Heller 2285.) (As G. rugo- 

 sa.) (?) Kaunakakai, Molokai. Reef. April 2. 1902. (U. S. 

 Fish Com. 3834.) 



The first specimen mentioned is a form which appears in some 

 respects intermediate betw^een the above species and G. cucuUigera 

 Kjellm. The frond is small, about 4 cm. high, much branched and 

 forming a dense mass. It has a greenish color (in material pre- 

 served in formaldehyde). The growth of the plant appears to be 

 entirely by repeated proliferations from the summit of the previous 

 branches. These proliferations arise in pairs, and ordinarily each 

 proliferation forks within 1 mm. of its base so that four branches 

 appear to rise from one point at the top of the older branch. The 

 proliferations are forked once or twice more towards the top, the 

 longest internodes being about 6 mm. in length, and 1 mm. in 

 width. The youngest proliferations are glabrous, collapsing on 

 drying and becoming faintly annulately rugose. The older prolif- 

 erations are densely hirsute, especially towards the top of each seg- 

 ment of the frond. The oldest parts of the frond are glabrate. 

 The cells of the innermost assimilatory layer are large, often much 

 lobed, about 35 mic. high, 35-70 mic. wide, the cells of the middle 



