NOTE ON THE ILLUSTRATIONS. 



ALL the plates in this volume (except the frontispiece) are 

 photographic reproductions of original drawings by the 

 authors Plates XXV, XXVIII, XXXII, and L, by collotype, 

 and all the rest by the half-tone process. 



Plates XXI, XXA^L XXX, XXXIV, XXXVII, XXXVIII, 

 XL, and XLIX are from drawings by Mr. Alder, and the 

 figures are of the same size as drawn by him; the rest are 

 from drawings by Mr. Hancock, and the figures are reduced 

 in size, mostly to about one-half. 



The figures in the text, with the exceptions of figs. 25-27, 

 48, 49, and 82-84, are reproduced by the half-tone process 

 from drawings by Mr. Hancock, and nearly all are reduced 

 in size. The figures excepted are photographic reproductions 

 of published figures, 25 and 27 being reduced in size from 

 the originals. 



The Editor has arranged the figures and treated them in 

 the same way as in Vol. I. He regrets that it has not 

 been found possible to identify all Mr. Alder's figures, owing 

 to the absence of descriptions of his completed plates. 



JOHN HOPKINSON. 



WEETWOOD, WATFORD, 



30th November, 1906. 



