CONTENTS 
Introduction ... 
PAGE. 
. 5 
Priapulus . 
••i ••• ••• ••• 0 •• ••• 0 
Phascolosoma . 
7 
• •• 00* ••• ••• *00 ••• 1 
Physcosoma 
. 19 
Bibliography . 
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Explanation of Plate... 
• 00 000 000 9 9 9 000 9 9 9 21 
Index 
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