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EXPLANATION OF THE PLATES. 



PLATE 1. 



Fig. 1. Araucaria Beccarii with Pteridium aquifolium in foreground ; vicinity of lake. 

 Fig. 2. Rafts made of three palm-trunks tied together, used by the Alfueros on both the 

 Angi lakes. 



PLATE 2. 



Fig. 3. Vegetation of marsh by $ lake, looking S.W. ; Koebre* Mt. in the background. 



Baeckea fnttescens . 

 Fig. 4. Vegetation of forest by $ lake, looking N.W. ; Koebre" in background. Myrmedoma 



arfakiana on extreme branches of tree *- , with Phyllocladus hypophyllus and 



Libocedrus arfakensis * . 



PLATE 3. 



Fig. 5. Araucaria Beccarii * , with Podocarpus papuanus and Polysrias sp. in centre ; 

 Pteridium aquilinum in foreground ; vegetation of forest by $ lake. 



Fig. 6. Vegetation of Koebre' ridge, showing Myrmedoma arfakiana, T50 m. high, flower- 

 ing , with tuber cut in longitudinal section * . 



[Photographs are reproduced by kind permission of Mr. A. E. Pratt.'} 



PLATE 4. 



Fig. 7. Thysanosoria dimorphophylla Gepp. Apical portion of plant, \ nat. size. 



