Plate V. 



Figs, 1 — 3. Ainphiroa aherrans. 



1. The abnormal forms, with proliferating decussate branches ; an Amphiroa 



of different species is growing together with Amphiroa aberrans in 

 the right hand tuft. 



2. A frond in less aberrant form ; broad, spathulate and thin articuli 



occurring at the apical portion of the frond. 



3. Normal frond. 



Fig. 4. Amphiroa dilatata, Lamx. 

 View from the dorsal side ; some of the branches are overturned to show 

 the couceptacles growing on the ventral side. 



Figs. 5 — 6. Amphiroa crassissima. 

 5. The sterile fronds. 

 G. T^he fertile fronds ; the right hand branch is seen from dorsal side, and 



the middle branch from ventral. Observe that the couceptacles are 



on the ventral margins of the articuli. 



