Qi 

 1832 



CONTENTS. 



PART I. 



ON THE NATURE AND RELATION OF MONOCARDIAN 

 ANIMALS ; AND MORE ESPECIALLY FISHES. 



CHAPTER I. 



Preliminary Remarks. — On the general Nature and Relations of Mono- 

 cardian Animals - - - - Page 1 



CHAP. IL 

 On Fishes in general ■ - - "11 



CHAP. III. 



A Sketch of the History and Bibliography of Ichthyology, with some Re- 

 marks on collecting and preserving Fishes - - - 54 



CHAP. IV. 



On the Systematic Arrangement of Fishes ... 72 



CHAP. V. 



On the Natural Arrangement of Fishes, the Primary Types of Form, and 

 the Analogies they present to other Classes of Animals 59 



CHAP. VI. 

 On the Order Cartilagines, or Cartilaginous Fishes - - 118 



CHAP. VII. 



On the Plectognathes, or Cheloniform Order - . - 189 



