IV PREFACE. 



Of these three hundred and thirty-nine figures, 

 two hundred and thirty-two are original, one 

 hundred being drawn from living (or, in the ease 

 of Fishes, from fresh) specimens, and one hundred 

 and thirty-two from such as are preserved, either 

 dry or in spirits. The list at the end of the 

 volume will show the authorities from which I 

 have copied the remaining one hundred and seven. 



I have added a Supplement to the first volume, 

 supplying some omissions, and bringing it up to 

 the present state of our knowledge. 



P. H. G. 



LONDON, August, 1856. 



