■•« •■ 







Sfe ®^p 



;.V«S 







(?- 



a 5: 



<©■■ 



:.;t*A- 





(5>. 



: -. :>^>' I 



M: 



w^m 



Microns 



80 



Figure 362. — Blood cells of C. virginlca containing iron in the connective tissue under the digestive tract. Drawing of 

 a section of oyster fed iron particles and treated with potassium ferrocyanide and hydrochloric acid. 



■■:■© 









Microns 



100 



Figure 363. — Iron particles in the mantle epithelium of ('. virginica fed iron oxide. Treated with ferrocyanide and 



hydrochloric acid. 



CHEMICAL COMPOSITION 



389 



