CONTENTS 



Introduction page 3 



Notes on Occurrence and Distribution 3 



Variation and Specific Characters 7 



Systematic Account 8 



Decolopodidae 8 



Colossendeidae 11 



Nymphonidae 24 



Phoxichilidae (Pallenidae) 82 



Phoxichilidiidae 87 



Endeidae 93 



Ammotheidae 94 



Pycnogonidae 125 



The Central Nervous System in Decolopoda 128 



Abnormalities 130 



Encrusting Organisms 132 



List of Literature 134- 



Index 136 



