PACIFIC SCIENCE 
A QUARTERLY DEVOTED TO THE BIOLOGICAL 
AND PHYSICAL SCIENCES OF THE PACIFIC REGION 
VOL. XXI OCTOBER 1967 NO. 4 
Previous issue published July 10, 1967 
CONTENTS 
PAGE 
On the Surface Swarming of Euphausiid Crustaceans. Yuzo Komaki 433 
The Ecology of Pelagic Amphipoda, IL Observations on the Reproductive Cycles 
of Several Pelagic Amphipods from the Waters off Southern California. 
Gary ]. Brusca 449 
The Zoeal Stages and Glaucothoe of the Tropical Eastern Pacific Hermit Crab 
Trizopagurus magnihcus ( Bouvier , 1898) ( Decapoda ; Diogenidae) , Reared 
in the Laboratory. Anthony J. Provenzano, Jr. 457 
Bathymetric Distribution of Chaetognatha, Siphonophorae, Medusae, and Cteno- 
phorae off San Diego , California. Angeles Alvarino 474 
Ecological Significance of a Drifting Object to Pelagic Pishes. Reginald M. 
Gooding and John J. Magnuson 486 
A Possible Relation between the Occurrence of a Dendritic Organ and the Dis- 
tribution of the Plotosidae (Cypriniformes ) . W.f. R. Lanzing 498 
The Family Olividae. John Q. Burch and Rose L. Burch 503 
Revision of the Genus Pandanus Stickman, Part 23. Three Australian Species of 
Pandanus. Harold St. John 523 
Revision of the Genus Pandanus Stickman, Part 24. Seychellea, a New Section 
from the Seychelles Islands. Harold St. John 531 
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