PACIFIC SCIENCE 
A QUARTERLY DEVOTED TO THE BIOLOGICAL 
AND PHYSICAL SCIENCES OF THE PACIFIC REGION 
VOL. XVIII APRIL 1964 NO. 2 
Previous issue published March 31, 1964 
CONTENTS 
PAGE 
The Origin and Affinity of the Biota of the Kodiak Island Group, Alaska . 
Robert E. Vincent 119 
Nonmarine Mollusks of Rongelap Atoll, Marshall Islands. Norman J. Reigle.... 126 
New Records of New Caledonian Nonmarine Mollusks and an Analysis of the 
Introduced Mollusks. Alan Solem..... 130 
Reproduction in the Aggregating Sea Anemone, Anthopleura elegantissima. 
Charles E. Ford, Jr.. 138 
Polydora. and Related Genera ( Annelida , Polychaeta) from Eniwetok, Majuro, and 
Bikini Atolls, Marshall Islands. Keith H. Woodwick 146 
Redescription of Bolbella californica Allgen, 1951 ( Enchelidiidae: Nematoda) 
with Notes on Its Ecology off Southern California. Gilbert F. Jones 1.60 
Occurrence of Two Species of Young Thread fin, Polydactylus opercularis and 
P. approximate, in the Offshore Waters of the Eastern Tropical Pacific Ocean. 
W. L. Klawe and F. G. Alverson.. 166 
Postlarval Scombroid Fishes of the Genera Acanthocybium, Nealotus, and 
Diplospinus from the Central Pacific Ocean. Donald W. Strasburg 174 
Identification of Leptocephalus acuticeps Regan as the Larva of the Eel Genus 
Avocettina. Grace L. Orton 186 
Some Aquatic Fungi Imperfecti from Hawaii. C. J. Anastasiou 202 
The Taxonomy of Polysiphonia in Hawaii. Ernani G. Menez 207 
Generalized Titanomagnetite in Hawaiian Volcanic Rocks. T akashi K at sura . . . . 223 
Recent Observations on Neck Extensions in F olliculinids (Protozoa). 
Donald C. Matthews... 229 
NEWS note: 
Tenth Pacific Science Congress Papers.. 236 
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