52 PLANTS FROM NEW CALEDONIA. 
compound organism, the alga being closely associated with a fungus to form 
a lichen-like thallus. In New Caledonia it was forming large masses several 
square inches in extent, and a few mms. high over mosses and tree-trunks. 
The thallus is bluish-green in colonr, and seems to consist of a basal mat of 
anastomosing threads from all parts of which arise numerous tapering tufts 
Fre. 1. 
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1772 777) LAME TORE 
7 T N 
BES INN NEIN 
A. Peronia erinacea Bréb. & Arn., x 1423. B-E. Scytonema Hieronymi Schmidle, 
x 510. F. ? Cymbella sp., x 610. G. Euastrum intermedium Cleve, f. scrobi- 
culata, nov. f., X 510. H-I. Zygnema pectinatum Ag., var. decussatum Kirchn. 
forma: H, x 350; I, x 142. J. Stenopterobia intermedia Lewis, var. crassior, 
var. nov., X 510. 
