9 o 



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



St.u. 93. Sulu Archipel 



Stat. 172. Gisser. 



St.u. 1S1. Ambon. 



Stat. [93. Sula-B 



Stat. 307. Endeh, [pih Bay. 



Sikka, Flores. leg. A. Weber-v. Bosse 18SS. 



f. cuspidata. 



Amphiroa cuspidata Lamx. 



60 and 303. Haingsisi, Island Samau. 

 St.it. 71. Makassar. 

 stat. Si. Islainl Sebangkatan. 

 Stat. 89. Kanjungan Island. 

 Stat. 193. Sula-Besi. 

 Stat. 240. Banda. 

 Stat. 249. Ronia Island. 

 Sikka and Maumeri, Flores. Padang, Sumatra. leg. A. Weber-v. Bosse 1888. 



f. cyathifera. 



Amphiroa cyathifera Lamx. 



Stat. 7 1 . Makassar. 



Stat. 93. Sulu Archipelago. 



Stat. 213. Saleyer Island. 



Stat. 280. Kur Island. 



Fronds articulated, cylindrical, branched at the node di- or trichotomously, often with 

 adventitious branches. Joints long, many times longer than broad, in older specimens swollen 

 at top and base in the fonn of a ball or pad, by local division in longitudinal and vertical 

 direction of the cells of the cortical layer. Nodes swollen cushionlike in conformity with the swollen 

 tops and bases of joints. 



Central strand built up of 4 — 8 rows of long cells, seldom 2 — 3 rows of long cells, mostly 

 4 rows, foliowed by one or two rows of short cells. 



Height of long cells from 60, 80, 100, 104, 120 u, mostly 80 [j. ; height of short cells, 

 12, 16, 28 <].. These short cells mark the intra-nodal periods of growth, seen so distinctly through 

 the cortical layer, and visible to the naked eye as little constrictions of the frond. In the middle 

 of the central strand the cells are often a little compressed, towards the periphery they are a 

 little broader. Cells of the central strand pass rather abruptly into the cortical layer, their rows 

 therefore as a rule straight, horizontal, little curved. 



In the node the structure of the central strand is the same as in the joint (PI. XVI, 

 tig. 2, the walls ol the cells are only thicker not calcitïed; cells of the cortical layer very 

 small, closely adhering together. 



Conceptacles prominent nol immersed in the frond, slightly elliptical seen from above, 

 or round. Diameter of conceptaculum > 300 — 340 a. 



1 he collection ol the Siboga contains a great number of slender Amphiroae with long 

 cylindrical joints and more or less thickened nodes. Comparing these with the authentic specimens 



