BIOLOGICAL DISTRIBUTION 



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TABLE I 

 Biological Distribution of Hemoglobins 



Phylum 



Pigment 



Examples 



Protozoans 



Hemoglobin in 

 cytoplasm. 



Ciliate paramecia 



Nematodes 



Erythrocruorin 

 in body cavitj- 



Myohemoglobin 

 in body wall 



Several species of Ascaris, intestinal para- 

 sitic worm in mammals. Two pigments 

 difiFerent in character 



Annelids 



Erythrocruorin 

 in plasma 



Erythrocruorin 



Chlorocruorin 

 in plasma 



Scattered throughout phylum, e.g., Areni- 

 cola, the lug worm, or Lumbricus, the 

 earth worm 



Several species of order Polychaeta, e.g., 

 Glycera, the blood worm 



Several species of order Polychaeta, e.g., 

 Spirographis, a marine worm 



Arthropods Erythrocruorin Found in several species, e.g., Daphnia, 



Crustaceans in plasma water flea, class Branchiopoda and, e.g., 



Ernoecera, parasite in fish, class Copepoda 



Insects 



Erythrocruorin 

 in plasma 



Chironomvs, midges (order Diptera) 



Molluscs 



Erythrocruorin 

 in plasma 



Erythrocruorin 

 in corpuscles 



Myohemoglobin 



Planorbis, fresh water snail (order Gas- 

 tropoda) 



Area, a mussel (order Lamellihranchiata) 



Busycon, a whelk (order Gastropoda) 

 Pigment in heart and radula muscles 

 (hemocyanin in circulation) 



Echinoderms 



Erythrocruorin 



Thyone, sea slug (class Holothttroidea) 



Chordates 



Protochordates 



So far, neither hemoglobin nor myohemo- 

 globin reported present in members of 

 this subphylum. Redfield (2222) reports 

 absence of hemoglobin in Amphioxus 



Vertebrates 



Hemoglobin 

 in corpuscles 



Myohemoglobin 



Present throughout, including Lampeira 

 (suborder Cyclostomata) 



Probably present throughout in lower 

 orders, e.g., Pisces, Amphibia, and 

 Reptilia, mostly in heart muscle 



