ORDER OF THE WORK. 
GENERAL INTRODUCTION. 
PART I. 
ZOOLOGY; 
BY JAMES E. DE KAY. 
PART II. 
BOTANY; 
MINERALOGY; 
BY LEWIS C. BECK. 
BY JOHN TORRES 
jr&y- - 
V \*v 
ABT 
III 
m 
'Z i. t* / o‘ 
PARTS IV. & V. 
GEOLOGY AND PALAEONTOLOGY; 
BY WILLIAM W. MATHER, EBENEZER EMMONS, LARDNER VANUXEM 
AND JAMES HALL. 
