LIST OF ILLUSTRATIONS xv 



FIG. PAGE 



ig. Heterogonic relation of heat of combustion to body- 

 weight in Tenebrio larvae ..... 28 



(After Teissier, 1931) 



20. Heterogony of water-content in wax-moth larvae 



(Galleria) . . . . . . . -3i 



(After Teissier, 1931) 



21. Heterogony of male and female chelae in two species 



of prawns (palaemon) ...... 33 



(A, from Tazelaar, 1931) 



22. Variation in the relative growth of the female 



abdomen in fiddler-crabs ..... 35 



(A, from Morgan, 1923 ; B, after Huxley, 1924) 



23. Relative growth of male and female abdomen in 



spider-crabs (inachus) ...... 36 



(From Shaw, 1928) 



24. ISOGONIC GROWTH OF PARTS IN THE FISH ORTHOPRISTIS . 37 



(From Hecht, 1916) 



25. Heterogony of antler-weight in adult Red Deer . 43 



(From Huxley, 1931A) 



26. Antler-weight against body-weight by age in Red 



Deer ......... 44 



(From Huxley, 1931A) 



27. Negative heterogony of antler-weight in Roe Deer 46 



(From Huxley, 1931A) 



28. Diagram of antler-growth in Red and Roe Deer . 47 



(From Huxley, 1931A.) 



29. Body-weight and antler-weight against age, Red 



Deer ......... 48 



(From Huxley, 1931A) 



30. Decrease of growth-coefficient during regenera- 



tion, Sphodromantis ...... 50 



(Modified from Przibram, 1917) 



31. Regulation of size in grafted eyes of Amblystoma . 52 



(From Twitty, 1930) 



32. Interrupted heterogony in the male chela of spider- 



crabs (Inachus) ....... 53 



33. Heterogony of the fore-limb in the beetle Euchirus 56 



(From Champy, 1924) 



34. Heterogony of the ' tail ' appendage of the w t ing in 



the butterfly papilio dardanus . . . -57 



(From Champy, 1924) 



35. Heterogony of the male mandible in three species 



of stag-beetles (Lucanidae) ..... 58 



(From Huxley, 1931c) 



36. Change of proportions with increased size in neuter 



ants (Pheidole) ....... 63 



(From Wheeler, 1910) 



37. Heterogony of head-size in neuter ants (Anomma 



and Camponotus) ....... 64 



38. Change of proportions with increased size in neuter 



termites (Termopsis) ...... 66 



(From Heath, 1927) 



39. Dimorphism of female abdomen and male chela in 



spider-crabs (Inachus) ...... 69 



(From Shaw, 1928) 



