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PACIFIC SCIENCE, Vol. XXI, October 1967 
signed specifically to obtain large numbers of 
individuals throughout the year is needed in 
order to eliminate density errors due to vertical 
migrations and gregarious activity. The fact that 
amphipods brood their young makes the group 
an ideal one for embryological studies if enough 
material can be obtained. The development and 
ecology of newborn amphipods could provide 
excellent problems for future research. 
REFERENCES 
Barnard, K. H. 1932. Amphipoda. Discovery 
Rept. 5:283-284. 
Brusca, G. J. 1967. The ecology of pelagic 
Amphipoda, I. Species accounts, vertical zona- 
tion and migration of Amphipoda from the 
waters off Southern California. Pacific Sci. 
21(3) :382-393. 
Fage, L. I960. Oxycephalidae, amphipodes 
pelagiques. The Carlsberg Foundation’s 
Oceanographical Expedition Round the 
World 1928-30 and previous "Dana” ex- 
peditions. Dana Rept. 52:24-26, 33-37, 
54-63. 
Hurley, D. E. 1956. Bathypelagic and other 
Hyperiidea from California waters. Allan 
Hancock Foundation, Occas. Papers 18:12- 
13 , 21 - 22 . 
Issacs, J. D., and L. W. Kidd. 1953. Issacs- 
Kidd Midwater Trawl. Scripps Inst. 
Ocean og., Ref. 53-3:1-21. 
Shoemaker, C. 1945. The Amphipoda of the 
Bermuda Oceanographic Expeditions, 1929- 
1931. Zoologica 30:185-266. 
Stephensen, K. 1918. Hyperiidea- Amphipoda 
(part 1), D,2. Report on the Danish Ocean- 
ographical Expeditions 1908-1910 to the 
Mediterranean and Adjacent Seas. Vol. II, 
Biology, C-D, 3, pp. 41-43. 
