PLATE V. 



Fig. 1. SIPUNCTTLUS 250 



Fig. 2. NEMERTES BORLASII 256 



Fig. 3. PONTOBDELLA MTJRicATA. a, 6. Egg-capsules. . 270 



Fig. 4. SERPTTLA CONTORTTJPLICATA 272 



Fig. 5. SPIRORBIS 274 



Fig. 6. SABELLA ALVEOLARIA 277 



Fig. 7. AMPHITRITE VENTILABRUM 280 



Fig. 8. AMPHITRITE BOMBYX. a, b, c. Reproductive 



powers after mutilation 282 



Fig. 9. AMPHITRITE rNTU^DiBULTiM 285 



