LIST OF ILLUSTRATIONS 



(!N THE ORDER OF THEIR INSERTION) 



PLATE i. Variation in color and in color pattern in Neritina virginea, 



variety minor. (In color) . 

 Goose-barnacle ...... 



Gerarde's figure of " Barnacles producing geise" 

 Variation in Trillium gran diflomm 

 Varieties of Paludestrina protea . 

 " Bag-worm," Thyroidopteryx ephemeriformis 



Honey-bees 



Varieties of horses 



The wild cabbage (Brassica oleraced) 



Frontispiece 

 4 

 5 

 6 



Following 



Following 

 Following 



Varieties of cabbage : Savoy cabbage, kale, broccoli, Brussels 

 sprouts, cauliflower, Swedish turnip, and kohlrabi . Following 

 Varieties of cabbage, etc., as figured in Gerarde's Herball, six- 



(In color) . . " 

 B. The evolution of the 



. Following 



21 



22 

 28 

 28 



28 



teenth century Following 28 



PLATE 9. Varieties of turnips " 28 



PLATE 10. Varieties of dahlias 

 PLATE 1 1 . " Cactus " type of dahlia 

 PLATES 12-15. Varieties of domestic chickens. 

 PLATE 16. A. Jungle fowl (Gallus bankiva), 



game cock .... 



PLATE 17. Japanese long-tailed cocks " 



PLATE 18. A. "Frizzled fowls." B. Head of Breda cock. C. Head of 



salmon faverolle Following 



PLATE 19. A. Feather from a "silky fowl." B. Leg of Cochin cock. 



C. " Cochin " bantams Following 



PLATE 20. Varieties of domestic pigeons " 



FIG. 5. Skull of Polish fowl 



FIG. 6. Rock pigeon (Columba livid) 



PLATE 21. Skeletons of various unicellular animals and plants . Following 

 PLATE 22. Male and female bobolink (Dolichonyx oryzivorus} . " 

 PLATE 23. Ruffed grouse (Bonasa umbellus}, male, female, and young " 

 PLATE 24. A. Male and female argus pheasant. B. Male and female lyre 



bird ......... Following 



PLATE 25. A. Male and female Nesocentor milo. B. Male and female pigeon 



{Phlogcenas jobiensis) ...... Following 



PLATE 26. Male and female humming-birds " 



PLATE 27. Turkey cock " strutting " " 



PLATE 28. Courting attitudes in hunting spiders .... " 



xiii 



28 

 28 

 30 



30 

 30 



30 



30 

 30 

 30 

 3i 

 32 

 48 

 48 



48 



48 

 48 

 48 

 50 



