No. S. A large area of diseaso pustules on a smooth-ljarked orchard tree. — I'hoto- 



(jraph htj I'rof. CoHiiix. 



No. 0. Bark removed from over a oauker, sliowiua: the cracks at the centre and 

 the fan-shaped spread of the yellowish fungous mycelium: also, at the lower edge, 

 the circular niaruin of the disease. — Pholoftrdjih hij Prof. CoUina. 



