CONTENTS 



PAGE 

 INTRODUCTION . . . . . . . . 9 



Economic Importance . . . . . .11 



Classification of the Arthrostraca ..... 13 



PART 1. AMPHIPODA . . . . . .15 



Key to the Sub-orders of Amphipoda . . . .15 



Anatomy ........ 15 



General Form of Body and Telson . . . .15 



Appendages ....... 18 



Antennas . . . . . .18 



Mouth Parts . . . . . .20 



Gnathopods and Pereiopods . . . .23 



Abdominal Appendages . . . . .25 



Sense Organs ....... 26 



Internal Anatomy ...... 27 



Sexual Differences . . . . . . .31 



Size 32 



Color . . . . . . . . .32 



Habitat . . . . . . .33 



Movements ........ 35 



Food ,37 



Enemies . . . . . ... .38 



Resistance to Adverse Conditions ..... 38 



Molting ........ 39 



Nests and Nest-building . . . . . .39 



Breeding Habits ....... 40 



List of Species ....... 43 



Hyperiidea ........ 44 



Gammaridea ........ 47 



Key to the genera of Gammaridea . . . .47 



Caprellidea ........ 174 



PART 2. ISOPODA ....... 185 



Key to the Sub-orders of Isopoda ..... 185 



External Anatomy . . . . . . .185 



Internal Anatomy . . .... 189 



Biology ........ 189 



5 



