PACIFIC SCIENCE 
A QUARTERLY DEVOTED TO THE BIOLOGICAL 
AND PHYSICAL SCIENCES OF THE PACIFIC REGION 
VOL. IX APRIL, 1955 NO. 2 
Previous issue published January 6, 1955 
CONTENTS 
PAGE 
Hotvland Island, Its Birds and Rats, as Observed by a Certain 
Mr. Stetson in 1854 . Llewellyn Howland 95 
Identity of Breeding Temperatures in Southern and. Northern Hemisphere 
Species of Mytilus (Lamellibranchia) . F. E. Allen 107 
Some Opistho branchiate Mollusca from Hatvaii. Jens Mathias Ostergaard . . .110 
Sponges of Onotoa. M. W. deLaubenfels 137 
Studies on the New Zealand Amphipodan Fauna No. 8. Terrestrial 
Amphipods of the Genus Talitrus Latr. D. E. Hurley 144 
The Osteology and Relationships of Certain Gobioid Fishes, with Particular 
Reference to the Genera Kraemeria and Microdesmus. William A. Gosline . 158 
Rattus exulans in Western Samoa. R. R. Marples . . . . 171 
Alebion echinatus Capart from Japanese Waters, with Observations 
on the Newly Found Male Form. Sueo M. Shiino . . .177 
A Theoretical Study on the General Circulation of the Pacific 
Ocean. Koji Hidaka 183 
The Tripteroides caledonica Complex of Mosquitoes in Melanesia 
( Dipt era : Culicidae). John N. Belkin 221 
Two Netv Pelagic Tunicates from the Eastern Pacific Ocean. Leo D. Berner . . 247 
NEWS NOTES 255 
Pacific Science is published quarterly by the University of Hawaii Press, in January, 
April, July, and October. Subscription price is $3.00 a year; single copies are $1.00. 
Check or money order payable to University of Hawaii should be sent to University of 
Hawaii Press, Honolulu 14, Hawaii, U.S.A. 
