No . Title 



S486. Recommended treatment for fish parasite diseases. By Glenn L. Hoffman, Bureau of Sport 

 Fisheries and Wildlife. April 1959, 4 p. 



487. Spiny lobster gear and fishing methods. By C. E. Cope, Bureau of Commercial Fisheries. 

 June 1959, iii + 17 p., 13 figs. 



488. Age determination of fishes. By Fred E. Lux, Bureau of Commercial Fisheries. 1959, 

 10 p., 7 figs. 



*489. Haddock. By Albert C. Jensen, Bureau of Commercial Fisheries. March 1960, 10 p., 

 5 figs. Superseded by FL 578. 



490. Sponges. By Paul S, Galtsoff, Bureau of Commercial Fisheries. March I960, 18 p., 

 14 figs. 



*491. Sea lamprey. By Lola T. Dees, Bureau of Commercial Fisheries. March 1960, 8 p., 

 4 figs. Superseded by FL 580. 



492. Sea turtles of the United States. By David K. Caldwell, Bureau of Commercial Fisheries. 

 March 1960, 20 p., 28 figs. 



*493. The bluefin tuna-trap fishery of the Western Mediterranean Sea. By J. R. Thompson, 

 Bureau of Commercial Fisheries. January 1960, iv + 10 p., 4 figs. 



S494. Fish mycobacteriosis (tuberculosis). By Thomas J. Parisot and James W. Wood, Bureau 

 of Sport Fisheries and Wildlife. March 1959, 3 p. 



495. Sea horses. By Lola T. Dees, Bureau of Commercial Fisheries. April I960, 9 p., 1 fig. 



*496. The true pikes. By John Van Oosten, Bureau of Commercial Fisheries. April 1960, 9 p., 

 1 fig., 3 tables. Superseded by FL 569. 



S497. A "virus" disease of chinook salmon. By A. J. Ross and R. R. Rucker, Bureau of Sport 

 Fisheries and Wildlife. March I960, 3 p. Superseded by FL 562. 



498. Culture, handling, and processing of Pacific Coast oysters. By Lynne G. McKee and 

 Richard W. Nelson, Bureau of Commercial Fisheries. April 1960, 21 p., 13 figs. 



499. Federal fishing vessel mortgage and loan insurance. By Branch of Loans and Grants, 

 Bureau of Commercial Fisheries. July 1960, ii + 12 p. 



500. Not issued. 



501. Fishery resources for aninnal food, reprints of ten magazine articles on. By Walter G. 

 Jones, Bureau of Commercial Fisheries. September I960, 22 p., 16 figs., 6 tables. 



502. Not issued. 



*503. Fishing vessel construction differential subsidy. By Branch of Loans and Grants, Bureau 

 of Commercial Fisheries. September 1960, lip. Superseded by FL 574, 



504. The American shad. By Gerald B. Talbot, Bureau of Commercial Fisheries. February 

 1961, 8 p., 1 fig., 1 table. 



505. Shipworms and other marine borers. By Michael Castagna, Bureau of Commercial 

 Fisheries. June 1961, i + 12 p., 7 figs. 



506. The Florida red tide. By Biological Laboratory, Bureau of Commercial Fisheries, 

 Galveston, Texas. 1961, 8 p., 3 figs. 



*507. World production and trade in fish meal and oil. By J. Adger Smyth, Bureau of Com- 

 mercial Fisheries. March 1961, 86 p., 22 figs., 62 tables, 



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