No. Title 



* 156. Spring and summer distribution of haddock on Georges Bank. By- 



John B. Colton. June 1955, iii + 65 pp., 17 figs., 28 tables. 



* 157. Longline fishing for deep- swimming tunas in the central Pacific, 



1953. By Richard S. Shomura and Garth I. Murphy. September 

 1955, vi + 70 pp. , 19 figs. , 28 tables. 



* 158. Exploratory experiments in guiding salmon fingerlings by a narrow 



D. C. electric field. By Parker S. Trefethen. June 1955, iii + 

 42 pp. , 15 figs. , 18 tables. 



* 159. Movements of small soft-shell clams (Mya arenaria). By Osgood R. 



Smith. June 1955, i + 9 pp. , 1 fig.. 2 tables. 



* 160. Tests of hatchery foods for salmon, 1953 and 1954. By Bobby D. 



Combs, David D. Palmer, John H. Finucane, and Roger E. 

 Burrows. August 1955, ii + 8 pp. , 3 tables. 



* 161. Zooplankton volumes off the Pacific Coast, 1954. By staff of South 



Pacific Fishery Investigations. September 1955, i + 35 pp. , 

 10 tables. 



* 162. Size frequencies and growth of central and western Pacific bigeye 



tuna. By Edwin S. Iversen. September 1955, vi + 40 pp. , 

 16 figs. , 14 tables. 



* 163. Commercial fishery for chubs (ciscoes) in Lake Michigan through 



1953. By Ralph Hile and Howard J. Buettner. October 1955, 

 ii + 49 pp. , 10 figs. , 21 tables. 



* 164. Mid-Pacific oceanography, part VII, Hawaiian offshore waters, 



September 1952 - August 1953. By Gunter R. Seckel. November 

 1955, vi + 250 pp. , 38 figs. , 5 tables. 



* 165. Food habits of Georges Bank haddock. By Roland L. Wigley. 



January 1956, iii + 26 pp., 4 figs. , 9 tables. 



* 166. Studies on an ichthyosporidium infection in fish: transmission and 



host specificity. By Paul V. Gustafson and Robert R. Rucker. 

 January 1956, i + 8 pp. , 3 figs. , 1 table. 



* 167. Passage of fission products through the skin of tuna. By Walter A. 



Chipman. February 1956, ii + 6 pp. , 2 tables. 



* 168. Mid- Pacific oceanography, part IX, operation NORPAC. By J. W. 



McGary, E. C. Jones, and T. S. Austin. January 1956, iv + 

 127 pp. , 11 figs. , 10 tables. 



* 169. Average year's fishing condition of tuna longline fisheries, 1952 



edition. Translated from the Japanese language by W. G. Van 

 Campen. January 1956, i + 131 pp. , 26 figs. , 76 tables. 



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