No. Title 



* 250. Catch rate, size, sex, and food of tunas and other pelagic fishes 



taken by trolling off Oahu, Hawaii, 1951-55. By Albert L. Tester 

 and Eugene L. Nakamura. December 1957, iv + 25 pp. , 1 fig. , 

 14 tables. 



* 251. Sardine eggs and larvae and other fish larvae, Pacific Coast, 1956. 



By Elbert H. Ahlstrom. January 1958, v + 84 pp. , 7 figs. , 

 19 tables. 



* 252. Oceanographic observations in the central North Pacific, September 



1954-August 1955. By James W. McGary and Edward D. Stroup. 

 January 1958, viii + 250 pp. , 144 figs. , 6 tables. 



* 253. Sodium cyanide as a fish poison. By W. R. Bridges. February 



1958, iv + 11 pp. , 5 tables. 



254. Foreign shrimp fisheries other than Central and South America. 

 Compiled in Branch of Economics, Bureau of Commercial Fish- 

 eries. March 1958, iii + 71 pp. , 6 figs. , 54 tables. 



* 255. Rapid counting of Nematoda in salmon by peptic digestion. By 



Joseph A. Stern, Diptiman Chakravarti, Joseph R. Uzmann, and 

 Mary N. Hesselholt. May 1958, iii + 5 pp. , 4 tables. 



* 256. Length- weight relation in the common or white shrimp, Penaeus 



setiferus. By William W. Anderson and Milton J. Lindner. May 

 1958, i + 13 pp. , 3 figs. , 4 tables. 



* 257. Serological differentiation of populations of sockeye salmon, Oneorhynchus 



nerha. By G. J. Ridgway, J. E. Cushing, and G. L. Durall. 

 August 1958, iii + 9 pp. , 1 fig. , 3 tables. 



* 258. Progress report on Alaska fisheries management and research, 



1957. By staff of the Alaska Region, Bureau of Commercial 

 Fisheries. June 1958, iv + 22 pp. , 37 figs. , 1 table. 



* 259. Age, length, and body weight of salmon caught by Japanese high-seas 



fleets in North Pacific. By George Tanonaka. February 1957, 

 iii + 10 pp. , 7 figs. , 1 table. 



* 260. Nutritive value of pollock fish scales as determined by rat feeding 



tests. By Donald G. Snyder and Hugo W. Nilson. December 



1958, iv + 1 1 pp. , 1 fig. , 2 tables. 



* 261. Plastic standpipe for sampling streambed environment of salmon 



spawn. By Harold A. Gangmark and Richard G. Bakkala. Novem- 

 ber 1958, v + 20 pp. , 11 figs. , 5 tables. 



* 262. Corrosion resistance of fish tagging pins. By Albert C. Jensen. 



December 1958, v + 6 pp. , 1 fig. , 5 tables. 



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