146 ANIMAL BIOLOGY 



to thirty-five pounds, depending on the locality. The aver- 

 age weight of small cod is twelve pounds, Jordan and Ever- 

 mann state that cod weighing 75 pounds are not common, 



Fig. 109. — The shad. (Goode.) 



but that one was caught off the New England coast that 

 weighed 21 1| pounds. 



Codfish are marketed fresh, pickled, salted, and dried. 

 Oil and isinglass are also obtained from the cod. 



Fig. 110. — The herring. (Jordan and Evermann. Courtesy of Doubleday, 



Page & Co.) 



109. Library study of other fishes. — (Optional.) 

 Consult Jordan and Evermann's " American Food and Game 

 Fishes," Hornaday's " American Natural History,'' and special 

 articles in Cyclopedias or other reference books, on one or more of 

 the following fishes: mackerel (Fig. 95), sardine, shad (Fig. 109), 

 herring (Fig. 110), white fish, smelt, bluefish, halibut, menhaden. 

 Write in your notebook an account of the fishes selected for study, 

 using the following topics as a guide : — 



