X PREFACE. 



I also desire to thank Mr. T. Sheppard, F.G.S., 

 of Hull, the editor of the publications of the Yorkshire 

 Naturalists' Union, for his assistance in the matter of 

 proof reading, preparing the Index of personal and 

 place-names, and seeing the work through the press. 



The Cliffe, 



Redcar. 



