X. 
XI. 
CONTENTS. 
INTRODUCTION 
Sponces or PoRIFERA 
1. COMMERCIAL SPONGES 
JELLYFISHES AND Hybrorbs 
Sea ANEMONES AND CoraLs 
Srarrisnues, SEA Urcarns anp Sea CucumMBers 
Worms 
BRACHIOPODS 
Moss ANIMALS AND CORALLINES 
CRUSTACEANS 
1. BaRNACLES 5. SAND FLEAS 
2. CRAYFISHES 6. CRABS 
3. SHRIMPS AND PRAWNS 7. Fippier Crass 
4. Hermir Crass 8. SEA SprpEeRS 
A, 
Mo.Liusks 
1. Crams, OysTERS AND MussELs 
2. Marine MusseELs 
3. Fresa-Water Musse&Ls 
4, Swarts AND SLUGS 
5. Nakep Mo.uusks or Sea SLuGs 
6. Seuip, Octopus AND NauTILus 
7. Seurps or Sea-ARRows 
TUNICATES 
PAGE 
15 
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