CONTENTS. 



CHAP. II. 



The Fourth Proposition considered. The primary Types of Nature 



Page 241 



CHAP. III. 



The Fifth Proposition considered. On the relative Rank of the different 

 circular Groups in the Animal Kingdom. On Species and Varieties. 

 On the Means thus offered by the Laws of natural Arrangement, for 

 the Verification of Groups. Familiar Illustration of the Principles of 

 Classification here developed. Questions on analogical Comparisons 266 



PART IV. 



A FAMILIAR EXPLANATION OF THE FIRST PRINCIPLES 

 OF PRACTICAL AND SCIENTIFIC ZOOLOGY, WITH SUG- 

 GESTIONS FOR A PLAN OF STUDYING THE DETAILS 

 OF EACH DEPARTMENT. 



CHAP. I. 



Preliminary Remarks. Distinction between practical and scientific Na- 

 turalists. Qualifications for both as Accuracy of Observation Per- 

 severance Concentration of Study Memory. Evils of indiscriminate 

 eollecting. Plans for collecting recommended - - 300 



CHAP. II. 



Importance of acquiring first Principles. Reasons for supposing a Plan in 

 Creation. Opinions thereon. The Circular Theory, and the different 

 Tests which every Circle must undergo, explained and illustrated 317 



CHAP. III. 



On the Rank and Names of the Natural Divisions, or Groups, in the 

 Animal Kingdom. Of Species and Varieties - - - 34i 



