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PACIFIC SCIENCE, Vol. XII, April, 1958 
ing of planktonic origin. If the two types of 
scattering have been caused by fish and plank- 
ton as is suggested, this is a record of fish 
which are associated with ascending plank- 
tonic concentrations. 
REFERENCES 
Bary, B. M. In press. Species of zooplankton 
as a means of identifying different surface 
waters and demonstrating their movements 
and mixing. Pacific Sci. 
Boden, B. P. 1950. Plankton organisms in 
the Deep Scattering Layer. U. S. Navy 
Electronics Lab., Rpt. 186. Pp. 29. San Diego, 
California. 
Deacon, G. E. R. 1937. The hydrology of the 
Southern Ocean. Discovery Rpt. 15: 1-124. 
Discovery Committee, London. Cambridge 
University Press, London. 
Garner, D. M. 1953. Physical characteris- 
tics of inshore surface waters between Cook 
Strait and Banks Peninsula, New Zealand. 
New Zeal. Jour. Sci. and Technol. Sect. B. 
35(3): 239-246. 
Dietz, R. S. 1948. Deep Scattering Layer in 
the Pacific and Antarctic Oceans. Jour. 
Mar. Res. 7(3): 430-442. 
Haffner, R. E. 1952. Zoogeography of the 
bathypelagic fish Chauliodus. System. Zool. 
1(3): 113-133. 
Hersey, J. B., and R. H. Bachus. 1954. New 
evidence that migrating gas bubbles, prob- 
ably the swim bladders of fish, are largely 
responsible for scattering layers on the con- 
tinental rise south of New England. Deep- 
Sea Res. 1(3): 190-191. 
Hersey, J. B., and H. B. Moore. 1949. 
Progress report on scattering layer observa- 
tions in the Atlantic Ocean. Amer. Geophys. 
Un., Trans. 29(3): 341-354. 
Johnson, M. W. 1948. Sound as a tool in 
marine ecology, from data on biological 
noises and the Deep Scattering Layer. Jour. 
Mar. Res. 7(3): 443-458. 
Kampa, E. M., and B. P. Boden. 1954^. 
Submarine illumination and the twilight 
movements of a sonic scattering layer. Na- 
ture Mag. 174(4436): 869 . 
and 1954A Sonic scattering 
layer studies. U. S. Off. Nav. Res. NR 165— 
195, Rpt. 1. 
Marshall, N. B. 1951. Bathypelagic fish as 
sound scatterers in the ocean. Jour. Mar. 
Res. 10(1): 1-17. 
Moore, H. B. 1950. The relation between the 
scattering layer and the Euphausiacea. Biol. 
Bui. 99(2): 181-212. 
Richardson, I. D. 1952. Some reactions of 
pelagic fish to light as recorded by echo 
sounding. [ Gt . Brit] Min. Agr. and Fish- 
eries , Fish Invest ., Ser. II 18(1): 1-20. 
Smith, P. F. 1951. "Measurements of the 
sound scattering properties of several forms 
of marine life.” Ref. no. 51-68 (unpub- 
lished ms.). Woods Hole Oceanographic In- 
stitute. 
1954. "Further measurements of the 
sound scattering properties of several forms 
of marine life.” Ref. no. 54-16 (unpub- 
lished ms.). Woods Hole Oceanographic In- 
stitute. 
