LIST OF ILLUSTRATIONS 



FIG. PAGE 



Heterochely AND REGENERATION IN THE LOBSTER 



Frontispiece 

 (From Przibram, 1931) 

 i. Diagram illustrating some quantitative aspects of 



heterogony ........ 5 



2. Changes in absolute and percentage weight of the 



large claw during growth in fiddler-crabs . 9 



3. heterogony of the large claw in 4oi male fiddler- 



CRABS ......... IO 



(From Huxley, 1927k) 

 ' 4. HETEROGONY OF STEM-WEIGHT AGAINST ROOT-WEIGHT IN 



VARIOUS PLANTS . . . . . . .13 



(From Pearsall, 1927) 



5. HETEROGONY OF PETIOLE LENGTH AGAINST LAMINA DIA- 



METER in Nasturtium leaves . . . . -14 



(From Pearsall, 1927) 



6. Changes in relative abdomen-breadth during the 



growth of the shore-crab . . . . .15 



7. heterogony of abdomen-breadth in 625 shore-crabs io 



(After Huxley and Richards, 1931) 



8. HETEROGONY OF THE CHELA IN THE PRAWN PALAEMON MAL- 



COMSONI . . . . . . . . 17 



g. heterogony of face relative to cranium in sheep- 

 dogs and baboons . . . . . . . 18 



10. Baboon skulls of various ages to show change in pro- 



portions ......... 19 



(From Zuckerman, 1926) 



11. HETEROGONY OF TAIL-LENGTH IN THE MOUSE PHENACOMYS 22 



12. HETEROGONIC RELATION OF DORSAL AND VENTRAL EYE- 



LOBES IN THE BAR-EYED MUTANTS OF DROSOPHILA . 22 



(Modified from Hersh, 1928) 



13. HETEROGONY OF INTER-OCULAR DISTANCE IN CRABS . 23 



(After Teissier, 1931) 



14. Change of proportions in shore-crab ... 24 



(From unpublished drawings kindly supplied by Dr. G. Teissier) 



15. HETEROGONY OF THORACIC GANGLION IN CRABS . . 25 



(After Teissier, 1931) 



16. HETEROGONY OF WATER-CONTENT IN TENEBRIO LARVAE 26 



(After Teissier, 1931) 



17. HETEROGONY OF NITROGEN-CONTENT IN TENEBRIO LARVAE 26 



(After Teissier, 1931) 



18. HETEROGONY OF PHOSPHORUS-CONTENT IN TENEBRIO 



LARVAE ......... 28 



(After Teissier, 1931) 



xiv 



