6 PREFACE. 



rate works of Milne-Edwards 1 and Bronn, a in which a 

 very full Bibliography will be met with. Dr. Rolleston's 

 valuable " Types of Animal Life," and the " Elementary 

 Instruction in Practical Biology," by myself and Dr. 

 Martin, will prove useful adjuncts to the appliances of the 

 practical worker. 



1 " Lemons sur la Physiologie et 1'Anatomie compare de 1'Homme et des 

 Animaux." Tomes i.-xii. (incomplete). 



a " Die Klassen und Ordnungen des TMerreiclis." Bde. i.-vi. (incomplete). 



LONDON, June, 1877. 



