xviii PROBLEMS OF RELATIVE GROWTH 



FIG. PAGE 



So. Disproportionate effect of starvation on a hetero- 



GONIC ORGAN (DORSAL CREST IN MALE TRITON) . . l8o 



(From Champy, 1924) 



81. Disproportion of limbs caused by precocious meta- 



morphosis in the frog ...... 182 



(Modified from Wells, Huxley and Wells, 'The Science of Life,' 

 London, 1931) 



82. Differential effect of thyroidectomy on the growth 



of various organs of the rat . . . 1 85 



(From Hammett, 1929) 



83. Effect of thyroidectomy on the growth of the hypo- 



physis IN THE RAT . . . . . . I 87 



(From Hammett, 1929) 



84. Diagram illustrating Przibram's hypothesis of the 



effect of differential growth-rates on chela- 

 reversal in heterochelous crustacea . . . igi 



85. Growth of normal and grafted eyes in two species 



of Amblystoma ...... 192-193 



(From Twitty and Schwind, 1931) 



86. Relative growth of eye in two species of Ambly- 



stoma ......... 194 



(From Twitty and Schwind, 1931) 



87. Interaction of parts of the eye in Amblystoma . 196 



88. Regulation of growth in eyes grafted on to indi- 



viduals of different age ..... 198 



(From Twitty, 1930) 



89. Changes in relative weight of different parts of the 



body caused by under-nourishment in rats . . 202 



(From Jackson, 1925) 



90. Comparison of absolute size and proportions of 



modern and prehistoric scottish red deer . . 206 



(After Ritchie, 1920) 



91. The female and five different forms of male in the 



stag-beetle cyclommatus ..... 209 

 (After Dudich, 1923) 



92. Relative growth of mandible in the five male forms 



of Cyclommatus . . . . . . .211 



(From Huxley, 1931c) 



93. Change of form with change of absolute size in the 



mandible of male stag-beetles . . . .212 



(From Grijfini, 191 2) 



94. Heterogony in groups larger than the species : PHE- 



NOMENON OF LAMEERE IN THE GENUS GOLOFA . 213 



(After Champy, 1929) 



95. Specific variations in the detail of a heterogonic 



organ (cephalic horn) in goliath beetles . . 217 



(From Champy, 1924) 



96. Developmental changes of proportion in wild and 



domestic sheep ....... 223 



(After Hammond, 1928) 



97. Graph showing relation of egg-weight to body-weight 



in 432 species of birds ...... 226 



(From Huxley, 1927c) 



