526 



ON INCREASE IN SIZE 



[PT. Ul 



Table 74, Results of investigations of temperature characteristics. 



Species 

 Mealworm {Tenebrio molitor) (pupa) 



5J 5) 55 



Fruit-fly {Drosophila) (egg + larva + pupa) 



55 55 55 



55 55 (imago) 



(egg+larva) 



5J 55 55 



(pupa) 



55 55 55 



Sea-urchin {Arbacia) (segmentation) 



55 55 _ ••• 



Frog (Rana) (segmentation) 



Frog (Rana) (ist segmentation to dis- 

 appearance of yolk-plug) 

 Frog (Rana) (3rd segmentation to dis- 

 appearance of yolk-plug) 

 Frog (Rana) (later) 



,, (till hatching) 



(early) 



„ (later) 



Cod {Gadus morrhua and aeglifinus) 



,, {Gadus merlangus) 

 Vlaice {Pleuronectes platessa) 

 Japanese teleost {Hypomesus olidus) 



„ ,, {Plecoglossus altivelis) 



Water-beetle {Dytiscus marginalis) 



„ {Dytiscus semisulcatus) 



Water-flea {Cyclops) 



55 55 



Fruit-fly {Drosophila melamgaster) 



Water-flea {Pseudosida bidentata) 

 ,, {Moina macrocopa) 



,, {Simocephalus semisulcatus) 



55 55 



Hen {Gallus dormsticus) ... 



55 55 



55 55 ••• ••• 



55 55 ••• ••• •" 



Fruit-fly {Drosophila melamgaster) 



95 55 



55 _ 55 



Trout {Salmo/ario) 

 „ J, 



Unless otherwise stated the lower /x is above 15°. 



compare the temperature coefficient of embryonic development in 

 the sea-urchin's egg with the temperature coefficient of respiratory 

 rate in the same material. Their figures for developmental rate gave 



