No . Title 



45. Age and growth of immature rosefish ( Sebastes marinus ) in the Gulf of Maine and off 

 western Nova Scotia. By Alfred Perlmutter and George M. Clarke. 1949, vol. 51, ii + p. 

 207-228, 21 figs., 14 tables. 15f. 



*46. Notes on the Philippine frigate mackerels, family Thunnidae, genus Auxis. By Charles B. 

 Wade. 1949, vol. 51, ii + p. 229-240, 10 figs., 7 tables. 



47. Definitions of body dimensions used in describing tunas. By John C. Marr and Milner B. 

 Schaefer. 1949, vol. 51, ii + p. 241-244, 1 fig. 5£ . 



48. Observations on juvenile oceanic skipjack (Katsuwonus pelamis) from Hawaiian waters and 

 sierra mackerel ( Scomberomorus sierra ) from the eastern Pacific. By Howard H. Eckles. 

 1949, vol. 51, ii + p. 245-250, 3 figs. 5£ . 



*49. Biology of the Atlantic mackerel ( Scomber scombrus ) of North America. Part II--Migra- 

 tions and habits. By Oscar Elton Sette. 1950, vol. 51, ii + p. 251-358, 21 figs., 31 tables. 



50. On the effectiveness of spermatozoa of the pink salmon ( Oncorhynchus gorbuscha ) at varying 

 distances from point of dispersal. By Richard F. Shuman. 1950, vol. 51, i + p. 359-363, 

 1 fig., 1 table. 10£. 



*51. Fluctuations in abundance of Columbia River chinook salmon ( Oncorhynchus tschawytscha ), 

 1935-45. By Ralph P. Silliman. 1950, vol. 51, ii + p. 365-383, 11 figs., 16 tables. 15£ . 



52. Apparent abundance of the pilchard ( Sardinops caerulea ) off Oregon and Washington, 1935- 

 43, as measured by the catch per boat. By John C. Marr. 1950, vol. 51, i + p. 385-394, 

 7 figs., 2 tables. 15£. 



53. Juvenile forms of Neothunnus macropterus , Katsuwonus pelamis and Euthynnus yaito from 

 Philippine seas. By Charles B. Wade. 1950, vol. 51, ii + p. 395-404, 13 figs. 15"^7~" 



*54. Description of a projection device for use in age determination from fish scales. By 

 Kenneth H. Mosher. 1950, vol. 51, i + p. 405-407, 4 figs. 



55. Observations on the spawning of Philippine tuna. By Charles B. Wade. 1950, vol. 51, 

 ii + p. 409-423, 3 figs., 9 tables. 15£. 



*56. Biometric comparison between yellowfin tunas (Neothunnus ) of Angola and of the Pacific 

 Coast of Central America. By Milner B. Schaefer and Lionel A. Walford. 1950, vol. 51, 

 ii + p. 425-443, 15 figs., 3 tables. 



*57. Larvae of tuna and tuna-like fishes from Philippine waters. By Charles B. Wade. 1951, 

 vol. 51, ii + p. 445-485, 28 figs., 20 tables. 



*58. An annotated bibliography on the biology of Pacific tunas. By Bell M. Shimada. 1951, vol. 

 52, ii + p. 1-58. 30^. 



59. Breeding habits of lake trout in New York. By William F. Royce. 1951, vol. 52, ii + p. 59- 

 76, 6 figs., 7 tables. 20£ . 



*60. Decline of the lake trout fishery in Lake Michigan. By Ralph Hile, Paul H. Eschmeyer, and 

 George F. Lunger. 1951, vol. 52, ii + p. 77-95, 6 figs., 16 tables. 20< . 



61. Characteristics of spawning nests of Columbia River salmon. By Clifford J. Burner. 1951, 

 vol. 52, ii + p. 97-110, 7 figs., 1 table. 20£ . 



62. Contributions to the biology of tunas from the western equatorial Pacific. By Bell M. 

 Shimada. 1 95 1 , vol. 52, ii + p. 1 1 1 - 1 19, 2 figs., 4 tables. 15£. 



*6 3. Postlarval Neothunnus macropterus , Auxis thazard, and Euthynnus lineatus from the Pacific 

 coast of Central America. By Giles W. Mead. 1951, vol. 52, iii + p. 121-127, 5 figs., 2 

 tables. 15£. 



