. Bulletin - United States National Museum. later stage. It is rather surprising to find the genital pores fully developedalready at such young age, as it is otherwise a general rule that inspecies attaining a large size (as does M. spatagus; it exceeds a lengthof 100 mm.) genital pores are rather late in appearing. I am then notaltogether sure that it may not ultimately be found that this youngspecimen (and I have similar specimens of the same size from Mauri-tius) represents another species, related to M. spatagus; also Clark(1925) finds such young specimens perplexing. I have, however, nosp
. Bulletin - United States National Museum. later stage. It is rather surprising to find the genital pores fully developedalready at such young age, as it is otherwise a general rule that inspecies attaining a large size (as does M. spatagus; it exceeds a lengthof 100 mm.) genital pores are rather late in appearing. I am then notaltogether sure that it may not ultimately be found that this youngspecimen (and I have similar specimens of the same size from Mauri-tius) represents another species, related to M. spatagus; also Clark(1925) finds such young specimens perplexing. I have, however, nospecimens of intermediate sizes and must therefore for the presentcontent myself with referring these young specimens to Metaliaspatagus. o SMITHSONIAN INSTITUTION UNITED STATES NATIONAL MUSEUM Bulletin 100 VOLUME 14, PART 4 CONTRIBUTIONS TO THE BIOLOGY OF THE PHILIPPINE ARCHIPELAGO AND ADJACENT REGIONS COPEPODS GATHERED BY THE UNITED STATES FISHERIES STEAMER ALBATROSS FROM 1887 TO 1909, CHIEFLY IN THE PACIFIC OCEAN BY CHARLES BRANCH WILSON. UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1950 For sale bv the Superintendent cf Documents, U. S. Government. Printing Office Washington 25, D. C. Price $ CONTENTS Page Foreword vii Introduction 141 Completion of specific characters 142 Other comparable collections 143 Systematic references 145 The number of species 146 Nets and methods of collection 146 General conclusions 147 The species collected 151 Genus Acartia Dana 151 Genus Acrocalanus Giesbrecht 157 Genus Aegisthus Giesbrecht 158 Genus Aetideus Brady 159 Genus Amallophora T. Scott 159 Genus Amallothrix Sars 159 Genus Amenophia Boeck 163 Genus Anomalocera Templeton 163 Genus Arietellus Giesbrecht 165 Genus Augaptilus Giesbrecht 170 Genus Bathycalanus Sars 171 Genus Bathypontia Sars 171 Genus Bradyidius Giesbrecht 172 Genus Calanoides Brady 174 Genus Calanopia Dana 174 Genus Calanus Leach 177 Genus Caligus Miiller 178 Genus Calocalanus Giesbrecht 179 Genus Candacia Dana
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