PREFACK. Vll 



I am also deeply indebted to Messrs. T. Sheppard, F".G.S., 

 James Schofield, and Charles Waterfall, all of the Hull 

 Scientific and Field Naturalists' Club, for a very larg'e share 

 they took in clerical work involved, and for other aid when 

 the Flora was passing' throug-h the press. 



The Map and Geolog'ical Section I owe to the kindness 

 and skill of Mr. W. H. Crofts of the Hull Geological Society, 

 and for the same he has my best thanks. 



The Hull Scientific and Field Naturalists' Club, and 

 Messrs. A. Brown & Sons, Ltd., between them having 

 relieved myself of personal financial responsibility in the 

 production of this work, renders me under a deep obligation, 

 which I take the opportunit}' of sincerely acknowledging;. 



Jas. Frasur Robinson. 



22, Harley Street, Hull, 

 July, 1902. 



