F. C. R. 



PREFACE. 



Fahrenheit, Celsius, and Reau- 

 mur, is introduced for com- 

 parison. 



My various sources of infor- 

 mation, and the friendly as- 

 sistance I have received on all 

 hands during the progress of 

 our work, are acknowledged, so 

 far as possible, in the text. 

 I need here only renew my 

 thanks to Staff- Commander 

 May and the officers of the 

 'Lightning,' and Captain Cal- 

 ver and the officers of the 

 ' Porcupine,' without whose 

 hearty sympathy and co-ope- 

 ration our task could never 

 have been satisfactorily accom- 

 plished ; to my colleagues, Dr. 

 Carpenter, F.R.S., and Mr. 

 Gwyn Jeffreys, F.R.S., who 

 have cordially assisted me in 

 every way in their power ; and 

 to the naturalists into whose 

 hands the animals of various 

 classes w T ere placed for descrip- 

 tion and study, — the Rev. A. 

 Merle Norman, Professor Kol- 

 liker, Dr. Carter, F.P.S., Dr. 

 Allman, P. U.S., Professor Martin Duncan, F.R.S., 



