riiEFACE. xni 



of more copious information. It may liowevei- 

 be proper to mention, that 1 liave more espe- 

 cially availed myself of the ample materials on 

 Comparative Anatomy and Physiology con- 

 tained in the works of Ciivier, Blumenbach, 

 Cams, Home, Meckel, De Blainville, La- 

 treille, and St. Hilaire, and in the volumes of 

 the Philosophical Transactions, of the Me- 

 moires and Annales dn Museum, and of the 

 Annales des Sciences Naturelles. I should 

 be uno;rateful were I not also to acknowledo-e 

 the instruction I have derived from my attend- 

 ance on the lectures at the Royal College of 

 Surgeons, delivered successively, during many 

 years, by the late Sir Everard Home, Sir 

 Astley Cooper, Mr. Lawrence, Mr. Brodie, 

 Mr. Green, and Sir Charles Bell ; and also 

 from those of Professor Grant, at the Uni- 

 versity of London . 



I have likewise to return my tlianks for the 

 liberal manner in which the Board of Curators 

 of the Hunterian Museum gave me permission 

 to take such drawings of the preparations it 

 contains, as I might Avant for the illustration 

 of tliis work ; and to Mr. Clift, the conserva- 

 tor, and Mr. Owen, the assistant conservator 

 of the museum, for their obliging assistance on 



