520 



ON INCREASE IN SIZE 



[PT. Ill 



Crozier himself emphasised the view that these facts opposed 

 the theory of metabohc gradients (see Section 3 '8), and, in 

 so far as that theory holds that such tissues as have the highest 

 metabohc rate (respiration intensity) must also be growing the 



0.0035 



Vj° <abs. 



0.00d6 



Fig. 82. Temperature characteristics of early development in teleostean fishes. 

 A, By Dannevig's data {Gadus); C, Krogh & Johansen's data {Pleuronectes); 

 D, Higurashi & Tauti's data {Hypomesus) ; E, Higurashi & Nakai's data {Plecoglossus) . 



fastest, Crozier's facts do oppose it. Other work on the temperature 

 characteristics of growth confirmed that of Crozier; Brown, for 

 instance, found jit's of 28,000, 17,210, 7410 and 19,800 for the adult 

 development of cladoceran arthropods, though in one instance it 

 must be admitted that he got a value of 16,950 {Simocephalus serru- 

 latus) . 



In a later paper, Crozier considered fully the results of many other 



