i6 



PROBLEMS OF RELATIVE GROWTH 



rat (analysis of the data of Donaldson, Hatai, Jackson, etc., 

 — see Donaldson, 1. c.) ; the length of the head of whalebone 

 whales during post-natal life (Mackintosh and Wheeler, 1929) ; 

 the lamina diameter and petiole length in Tropaeolum leaves 



6 8 10 20 



carapace length, mm. 



30 40 50 



Fig. 7. 



-Increase of width of abdomen with increase of carapace length in 

 the shore crab, Carcinus maenas : logarithmic plotting. 



+■ , unsexables ; 0, females ; H males. The growth coefficient for unsexables and young females is 

 1-26, for older females 1-42, that for young males 107, for older males 0-94. 



(Pearsall, 1927), and even for the amounts of various chemical 

 substances in the growing larvae of the wax-moth Galleria 

 and the meal-worm beetle Tenebrio (Teissier, 1929, 1931), as 

 well as for organs which, physiologically speaking, represent 

 special cases, as the antlers of deer which are shed every year 



