Journal Royal Society N.S. W., Vol. XLIX., 1915. 



Plate XXXIII. 



u. *>. *. v. A 



F ' 



*:m^ 



FIG 7. TRANSVERSE SECTION NEAR THE TOP OF EXPOSED PORTION ABOVE THE MUD OP A 



PNEUMATOPHORE, BUT CUTTING CENTRAL ROOT LOWER DOWN THAN THAT SHOWN 



IN FIG 4. ON THE LEFT IS PORTION OF A PNEUMATHODE IN SECTION X 30. 



AVICENNIA OFFICINALIS, LlNN. 



