10 20 30 40 



Oxygen Tension (mm Hg) 



Fig. 4.20. Oxygen Dissociation Curves for Haemerythrin of Sipunculus 

 nudus (19 & C, C0 2 0-07-80 mm Hg), and Chlorocruorin of Spirographs 



spallanzanii (20°C, pH 7-7) 

 (Haemerythrin data from Florkin, 1932; chlorocruorin data from H. M. Fox, 1932.) 



Fig. 



60 - 



5 



.§ 40 



5 



/ 



2 3 4-56 



Oxygen Concentration 



4.21. Effect of carbon monoxide on Oxygen Consumption of Sabella 

 pavonina, a Worm Containing Chlorocruorin 



The curves show the rate of 2 consumption at various concentrations of dissolved 2 

 (17°C). Circles, normal animals; triangles, animal with carboxychlorocruorin. (From 

 Ewer and Fox (46).) 



