CONTENTS. 



PAGE. 



Hapalocarcinus marsupialis Stimpson 35 



Introduction 35 



The galls in Pocillopora caespitosa 38 



The galls in Seriatopora hystrix 41 



Gall formation in Stylophora and Sideropora 44 



Action of the respiratory current on individual polyps 44 



The general configuration of the buccal area 47 



The buccal appendages 49 



The stomach 50 



The contents of the stomach 52 



The female and its various stages of growth 56 



The male 58 



The eggs and larva; 60 



Cryptochirus Heller 61 



A comparison of Hapalocarcinus and Cryptochirus 64 



The affinities of the Hapalocarcinidte 67 



The hosts of Hapalocarcinus and Cryptochirus 68 



Summary 69 



Bibliography 69 



34 



