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EXPLANATION OF PLATES. 



PLATE IV. 



Ftg. 



18. Williams' Bon Chretien Pear (Winter Bartlett) with Bitter Pit. Surface raised 



into irregular folds and puckered, forming rounded elevations with correspond- 

 ing depressions. (Belair, South Australia, 3.4.12.) 



19. Section lengthwise of same, showing brown patches beneath the skin opposite 



depressions. 



20. Cluster of Beurre Clairgeau Pears, about one-third grown, with smallest pear in 



centre, which is not usual. 



