PACIFIC SCIENCE 
A QUARTERLY DEVOTED TO THE BIOLOGICAL 
AND PHYSICAL SCIENCES OF THE PACIFIC REGION 
VOL. XII OCTOBER 1958 NO. 4 
Previous issue published July 10, 1958 
CONTENTS 
PAGE 
Soils and Agriculture of the Palau Islands. A. J. Vessel 
and Roy W. Simonson 281 
Pacific Area Distribution of Fresh- Water and Marine Cercarial 
Dermatitis. George W. T. C. Chu 299 
Some Observations on the Lagoon Plankton of Enhvetok Atoll. 
Malvern Gilmartin 313 
On Certain Thaliacea (Tunicata) from the Pacific Ocean, ivith Descriptions 
of Two New Species of Doliolids. Takasi Tokioka and Leo Berner . . .317 
A Revietv of the Labrid Fish Genus Labroides, with Descriptions of 
Two New Species and Notes on Ecology. John E. Randall . . . . . .327 
Metamorphosis of the Shell in the California Sea Hare, Aplysia 
californica Cooper. Lindsay R. Winkler 348 
Specific Characters and Character Variants in Adults and Larvae of the Genus 
Paratrombium Bruy ant 1910 ( Acari , Trombidiidae), with Descriptions of 
Two New Species from Western North America. Irwin M. Newell . . .350 
INDEX 371 
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 14, Hawaii, U.S.A. Printed by The Advertiser Publishing Company, 
Ltd., Honolulu 2, Hawaii. 
