12. Of the calanoid Copepoda the abundance 

 of the following genera exhibited the most 

 marked diel variation: Pleuromamma . Neoca- 

 lanus , Candacia , Undinula , and Euchaeta . The 

 genus Haloptilus was absent from the upper 

 layer of water. 



13. An unusual bloom of a diatom. Rhizoso- 

 lenia sp., was encountered August 1-6, 1956. 



14. Average volumes from monthly samples 

 of zooplankton from three stations on the wind- 

 ward side of Oahu and from three stations on 

 the leeward side did not differ significantly. 

 The data yielded indications of seasonal peaks 

 in January, April, and September. 



15. The average volumes of zooplankton at 

 an inshore station 5 miles (8 kilometers) from 

 shore and an offshore station 25 miles (40 kil- 

 ometers) from shore did not differ. 



16. The volumes of zooplankton from oblique 

 hauls to a depth of 200 m. in 1955-56 were 

 among the lowest recorded for this type of haul 

 during 1951-56. 



ACKNOWLEDGMENTS 



Elbert H. Ahlstrom offered constructive cri- 

 ticisms of the manuscript, Everet C. Jones aided 

 in identifying copepods, and Maxwell S. Doty 

 identified the phytoplankton. 



LITERATURE CITED 



GUSHING. D. H. 



1951. The vertical migration of plankton 

 Crustacea. Biol. Rev. 26(2): 158-192. 



HIDA, THOMAS S., and JOSEPH E. KING. 



1955. Vertical distribution of zooplankton in 

 the central equatorial Pacific, July- 

 August 1952. U.S. Fish Wildl. Serv., 

 Spec. Sci. Rep. Fish. 144, iv + 22 p. 



KIKUCHI, KENZO. 



1930. Diurnal migrations of plankton Crus- 

 tacea. Quart. Rev. Biol. 5(2): 189-206. 

 KING, JOSEPH E., THOMAS S. AUSTIN, and 

 MAXWELL S. DOTY. 



1957. Preliminary report on expedition Eas- 

 tropic. U.S. Fish Wildl. Serv., Spec. Sci. 

 Rep. Fish. 201, iv + 155 p. 

 KING. JOSEPH E., and JOAN DEMOND. 



1953. Zooplankton abundance in the central 

 Pacific. U.S. Fish Wildl. Serv., Fish. 

 Bull. 54: 111-144. 



KING, JOSEPH E., and THOMAS S. HIDA. 



1954. Variations in zooplankton abundance in 

 Hawaiian waters. 1950-52. U.S. Fish 

 Wildl. Serv., Spec. Sci. Rep. Fish. 118, 

 v + 66 p. 



1957. Zooplankton abundance in Hawaiian 

 waters, 1953-54. U.S. Fish Wildl. Serv., 

 Spec. Sci. Rep, Fish. 221, v + 23 p. 

 MILLER, S. M., H. B. MOORE, and K. R. 

 KVAMMEN. 



1953. Plankton of the Florida Current. 1. 

 General conditions. Bull. Mar. Sci. Gulf 

 Caribbean 2(3): 465-485. 

 SNEDECOR, GEORGE W. 



1956. Statistical methods. Fifth ed. Iowa 

 State College Press, Ames, xiii + 534 p. 



WELCH, PAUL S. 



1948. Limnological methods. Blakiston Co., 

 Philadelphia, xviii + 381 p. 



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