THE SEA FISHERIES OF EASTERN NORTH AMERICA. 7 



F. Natural food— Continued. Page. 



3. Animal substances 75 



(a) Dead 75 



Carcasses and offal 75 



By scavengers 75 



Lobsters and other Crustacea 75 



Sharks and other fish 75 



(I)) Living 75 



Eggs and embryos of fish 75 



Extensive support of life in the sea 75 



Adult fish 76 



Invertebrates 70 



Plant eating , 76 



Protozoa (infusoria, sponges. ) 76 



Radiates (holothuria, acalephae, &c. ) 76 



Carnivorous 76 



Mollusks 76 



Principal food of ground fish 76 



Squid : larva; of herring and mackerel 76 



Salpa 76 



Articulates 76 



• Nereis, bluehsh, Fire Island crabs, thysanopoda. 76 



Protozoa and radiates ._ 79 



Jelly-fish and echinoidea 79 



Mackerel 79 



G. Reproduction 80 



1. Fecundity 81 



(a) Table of eggs 82 



2. Character of eggs 83 



(a) Free swimming 83 



Mackerel 84 



Plaice 84 



(6) Adherent 84 



3. Rate of growth of young 84 



4. Peculiar habits or condition during spawning season 84 



(a) Change of shape 84 



Sea bass 84 



(&) Change of color 84 



5. Period of maturity 85 



6. Duration of fertility ". 85 



II. — Methods of Capture (Fisheries). 



A. The fishing grounds 85 



George's Bank 85 



Brown's Bank 86 



Jeffrey's Ledge 87 



Cashe's Ledge 88 



Jeffrey's Bank 88 



German Bank 88 



Marblehead Bank 89 



Grand Manan Bank 89 



Seal Island Ground „ 89 



Roseway Bank 90 



Le Have Bank 91 



Le Have Ridges 91 



