894 



GENERAL METABOLISM 



[PT. Ill 



being used by the embryo faster than it can absorb water from outside, 

 and this begins when about i-io gm. of yolk is left unconsumed. 

 This is important with regard to growth-rate (see p. 406). 



Diagram illustrablng the olevelopemenb of the ecjg of S.fario 

 A.Newlj ferbilised eo|C) 

 B. Larva 80 days old J read_y bo absorb foodb_yc)ub. 



sac 



\ Embryo 



Fig. 236. 



Ranzi's parallel work on the egg of the squid, Sepia officinalis, led 

 to an equation similar to that given above for the trout: 



Wet + External + External = Wet + Dry yolk used for 

 yolk water ash squid other purposes 



(i-ogm.) (o-ySgm.) (o-033gm.) (1-727 gm.) (0-089 gm.) 



He obtained curves identical in general form with that shown in 



