PACIFIC SCIENCE 
A QUARTERLY DEVOTED TO THE BIOLOGICAL 
AND PHYSICAL SCIENCES OF THE PACIFIC REGION 
VOL. XVIII JULY 1964 NO. 3 
Previous issue published May 18, 1964 
CONTENTS 
PAGE 
A Revision of the Genus Parapercis, Family Mugiloididae. 
George E. Cantwell 239 
Notes on the Groupers of Tahiti, with Description of a New Serranid Fish Genus . 
John E. Randall 281 
Shell Selection and Invasion Rates of Some Pacific Hermit Crabs. 
Gordon H. Orians and Charles E. King 297 
Some Marine Isopod Crustaceans from off the Southern California Coast. 
George A. Schultz 307 
Some Bathyal Pacific Amphipoda Collected by the U.S.S. Albatross. 
J. Laurens Barnard.... 3 IS 
The Chaetognatha of the Monsoon Expedition in the Indian Ocean. 
Angeles Alvar ino 336 
Additional Records of Hawaiian Platyctenea ( Ctenophora ). 
Donald C. Matthews and Sidney }. Townsley 349 
NEWS note: 
Tenth Pacific Science Congress Papers 352 
Pacific Science is published quarterly by the University of Hawaii Press, in January, 
April, July, and October. Subscription price is $4.00 a year; single copy, $1.25. Check 
or money order payable to University of Hawaii should be sent to University of Hawaii 
Press, Honolulu, Hawaii, U. S. A. 96822. Printed by Star-Bulletin Printing Company* 
420 Ward Avenue, Honolulu, Hawaii 96814. 
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SEP 3 1964 
