PLATE XXXIII. 



Exposed roots of Q. pedunculata in Park Road, St. Leonards-on-Sea, upon 

 which wei-e found enormous nvimbers of galls caiised by Biorhiza 

 APTERA. The scale (marked *) is 30 cm. ; the fern trowel indicates 

 where specimens in Plate XXXI were growing. 



Adlard ^- Son, Impr. 



