PLATE 7. 



Transverse section of the wood of Brachyoxylon notabile, showing 

 wound resin canals. X 40. 



Another section of the same showing traumatic resin canals more 

 remote from the wound. X 40. 



Transverse section of the wounded stem of Araucariopitys ameri- 

 cana, showing wound resin canals. X 100. 



Transverse section of a wood from the English Jurassic, showing 

 traumatic resin canals. X 40. 



Longitudinal section of the same. X 40. 



Tangential section through the wood of the peduncle of the cone of 

 Agathis Bidmllii, showing the presence of a normal resin canal in 

 the vascular supply of the cone-scale. X 100. 



