LIST OF ILLUSTRATIONS 



Portrait of Author ..... Frontispiece 



Map showing the 1000-fathom line . . To face page 349 



FIG. PAGE 



1. Diagram of Variations of Lacerta muralis . . 47 



2. ,, Variation of Lizards . . . .48 



3. ,, Variation of wings and tail of Birds . 53 



4. ,, Variation op Dolicho^^yx oryziyorus . 55 



5. ,, Variation of Agel^us phoeniceus . . 56 



6. ,, Variation of Cardinalis virginianus , 58 



7. „ Variation of tarsus and toes . . 60 



8. ,, Variation of Birds in Leyden Museum . 61 



9. ,, Variation of Icterus Baltimore . . 63 



10. „ Variation of Agel^us ph(eniceus . . 64 



11. „ Curves of Variation . . . .64 



12. ,, Variation of Cardinalis yirginianus . 65 



13. ,, Variation of Sciurus carolinensis . . 67 



14. ,, Variation of skulls of "Wolf , . 70 



15. ,, Variation of skulls of Ursus labiatus . 72 



16. ,, Variation of skulls of Sus cristatus . 73 



17. Primula veris (Cowslip). Yrom Daxv^m's Forms of Floivers . 157 



18. Gazella scemmerringi (to show recognition marks) . . 219 



19. Recognition marks of African Plovers (from Seebohm's 



Charadriddoe ....... 221 



