LIST OF ILLUSTRATIONS 
I'OKTRAIT OF AUTHOR .... 
Map showing the 1000-fathom line 
FIG. 
1. Diagram of Variations of Lacekta murai.is 
. Frontispiece 
To face page 349 
2. 
.> 
Variation 
OF 
Lizards . . . . 
48 
3. 
Variation 
OF 
WINGS AND TAIL OF BIRDS 
53 
4. 
Variation 
OF 
Dolichonyx ORYZIVORUS 
55 
5. 
9 * 
Variation 
OF 
AgELjEUS phceniceus 
56 
6. 
9 9 
Variation 
OF 
Cardinalis virqinianus 
58 
7. 
9 * 
Variation 
OF 
TARSUS AND TOES 
60 
8. 
y y 
Variation 
OF 
Birds in Leyden Museum 
61 
9. 
y y 
Variation 
OF 
Icterus Baltimore 
. 63 
10. 
99 
Variation 
OF 
Agelsus phceniceus 
64 
11. 
Curves of 
Variation . . . . 
64 
12. 
Variation 
OF 
Cardinalis virginianus 
65 
13. 
Variation 
OF 
Sciurus carolinensis . 
67 
14. 
Variation 
OF 
skulls of Wolf 
70 
15. 
9 y 
Variation 
OF 
SKULLS OF URSUS LABIATUS 
72 
16. 
>y 
Variation 
OF 
SKULLS OF SUS CRISTATUS 
73 
17. 
Primula 
veris (Cowslip). 
From Darwin’s Forms of Flowers . 
157 
18. Gazella scemmerringi (to show recognition marks) 
19. Recognition marks of African Plovers (from Seebohm’ 
Charadriadce ...... 
PAGE 
47 
219 
221 
