300 
PART TV. 
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. 
CHAPTER I. 
PRELIMINARY REMARKS. — DISTINCTION BETWEEN PRACTICAL 
AND SCIENTIFIC NATURALISTS. — QUALIFICATIONS FOR BOTH 
— AS ACCURACY OF OBSERVATION — PERSEVERANCE — CON- 
CENTRATION OF STUDY — MEMORY. — EVILS OF INDISCRIMI- 
NATE COLLECTING. — PLANS FOR COLLECTING RECOMMENDED. 
(366.) To those naturalists who have already acquired 
a knowledge of the actual state of our science, and to 
those few who are competent to extend its limits, we 
have devoted a large proportion of this volume. But as 
a much greater number of our readers will be students, 
anxious to see the first principles of zoology explained 
in familiar language, we feel that our labours may be 
usefully directed to this object ; for it is desirable that 
the rudiments of all sciences should be condensed and 
simplified. There is, indeed, no “ royal road” to zoo- 
logy, any more than to other branches of sound know- 
ledge ; but its first principles may be explained in 
simple language, and illustrated by familiar examples ; 
its difficulties may be smoothed by avoiding unnecessary 
technicalities; and words and expressions, which may 
perplex the beginner, may be rendered intelligible as 
they occur, and thus become fixed upon the memory. 
We shall, therefore, in the following pages, occasionally 
adopt a style more colloquial than didactic; we shall 
converse rather than compose, and endeavour to smooth 
that path of instruction which every student must tread 
