TABLE OF CONTENTS. 



PAGE 



Introduction 5 



Scope and purpose of paper 5 



New species 7 



Species not previously reported from Monterey Bay .... 7 



List of species treated 8 



Key to the suborders of the order Decapoda 1 1 



Key to the tribes of the suborder Reptantia 1 1 



Key to the families of the tribe Brachyura I2 



Brachyura of Monterey Bay 14 



Subtribe Dromiacea 14 



Superfamily Dromiidea 14 



Family Dromiidae 14 



Subtribe Oxystomata t8 



Family Dorippidae 18 



Family Leucosiidae 18 



Family Calappidae 19 



Subtribe Brachygnatha 21 



Superfamily Oxyrhyncha 21 



Family Parthenopidae 21 



Family Inachidae 21 



Superfamily Brachyrhyncha 35 



Family Cancridae 35 



Family Portunidae 49 



Family Pilumnidae $0 



Family Pinnotheridae 53 



Family Grapsidae 61 



Bibliography 64 



Explanation of plates 65 



