9 2 



nodes are very inconspicuous ; where nodes are visible they are composed of central strand and 

 cortical layer. Intra-nodal period of growth consisting of 4, 5 rows of long cells, 36, 56, 72, 76 u. 

 high, short cells ! 1 2 ■>. high. 



Conceptacula prominent; diameter of conceptaculum 160 — ibop.; tetraspores 4S a high. 



Stat. 78. Lumu-Lumu-shoal, Borneo-bank. 

 Sikku, Flores. leg. A. Weber-v. Bosse 1888. 



The little plant is in all its details smaller than A. fragilissima and yet the structnre 

 of its central strand and its prominent conceptacula are so exactly like what one sees in A. 

 fragilissima that I feel convinced that the two plants must be closely allied. A. anastomosans 

 is a dwarf-form, and its small conceptacula and the absence of pad-like swollen nodes have 

 induced me to distinguish it as a new species. 



3. Amphiroa foliacea Lamx. PI. XIV, fig. 1 — 11. 



Lamouroux in Voyage de 1'Uranie par Freycinet Zoölogie par Quoy et Gaimard, p. 628, 



tab. 93, fig. 2—31. 

 Areschoug in J. G. Agardh, Spec. Gen. et Ordines Algarum, 1851, p. 541. 

 Amphiroa squarrosa Grunow, in bot. herb. zu Hamburg! 



f. procumbens. 



Stat. 248. Island Tiur. 

 Stat. 282. Eastpoint Tirnor. 



f. c recta. 



Stat. 71. Makassar. 



Stat. 78. Lumu-Lumu-shoal, Borneo bank. 



Stat. 91. Muaras-reef, Borneo bank. 



Stat. 93. Sulu Archipelago. 



Stat. 99. North-Ubian. Sulu Archipelago. 



Stat. 129. Island Karkaralong. 



Stat. 240. Island Banda. 



Stat. 261. Kei-Elat, Kei Islands. 



Stat. 281. Timor. 



Fronds branched, di- or trichotomously, with adventitious branches springing from the 

 nodes, dimorphous: either creeping horizontally with broadly winged joints with undulating 

 border, or ascending vertically with joints almost cylindrical, more or less flattened, more or 

 less winged with narrow undulating border. Joints not swollen and paddike as in A. fragilissima. 

 Nodes consisting of central strand and cortical layer; as a rule as broad as the joint, but if 

 the joint is very much winged, not quite so broad. Central strand built up of 3, 4 rows of 

 long cells 44, 60, 76, 84, 92, 96 jul high, foliowed by a row of short cells 8, 16, 24 u. 

 high. Cells of the central stram! pass not abruptly at the periphery into the cells of the cortical 

 layer forming the wing, sometimes in broad specimens these latter cells are quite as high as 

 : of the central strand. Rows of cells of the central strand form curved lines, not straight 

 as in A. fragilissima, conceptacula half immersed in the frond, not so prominent as in 

 A. fragilissima. Diameter of conceptacula 240 — 400 ij. ; height of tetraspores 48 p.. 



