v. 41, iv+347 p. il. 10 pl. 34 p. of por, pl. and facsim. large 8°
Notes:
* For Sale by Superintendent of Documents. Cloth, $1.50.
Notes:
CONTENTS.—Variation in maximum depth at which fish can live during summer in moderately deep lake with thermocline; by Frank Smith.—Black tumor of catfish; by Raymond C. Osburn.—Growth and degree of maturity of chinook salmon in the ocean [with bibliography]; by Willis H. Rich.—Seasonal distribution of plankton of Woods Hole region [with bibliography]; by Charles J. Fish.—Digestive enzymes in poikilothermal vertebrates, investigation of enzymes in fishes, with comparative studies on those of amphibians, reptiles, and mammals [with bibliography]; by Walter A. Kenyon.—Growth and age at maturity of Pacific razor clam, Siliqua patula (Dixon) [with bibliography]; by F. W. Weymouth, H. C. McMillin, and H. B. Holmes.—Fishes of Republic of El Salvador, Central America; by Samuel F. Hildebrand.—Fur-seal industry of Commander Islands, 1897-1922; by Leonhard Stejneger.—General index.
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* For Sale by Superintendent of Documents. Cloth, $1.50.