LIST OF ILLUSTRATIONS 

 IN THE TEXT 



1. THE COMMON LOBSTER (Homarus gammants), FEMALE, 



FROM THE SIDE - 7 



2. ONE OF THE ABDOMINAL SOMITES OF THE LOBSTER, WITH 



ITS APPENDAGES, SEPARATED AND VIEWED FROM IN 

 FRONT 9 



3. THIRD MAXILLIPED OF LOBSTER - n 



4. WALKING LEGS OF LOBSTER - 12 



5. APPENDAGES OF LOBSTER IN FRONT OF THIRD MAXIL- 



LIPED 13 



6. DISSECTION OF MALE LOBSTER, FROM THE SIDE 16 



7. GILLS OF THE LOBSTER, EXPOSED BY CUTTING AWAY THE 



SIDE-FLAP OF THE CARAPACE (BRANCHIOSTEGITE) - 18 



8. FIRST LARVAL STAGE OF THE COMMON LOBSTER, x 4 - 28 



9. SIDE - VIEW OF ROSTRUM OF (A) COMMON LOBSTER 



(Homarus gamtnanis) AND (B) AMERICAN LOBSTER 

 (Homants americanus) - 32 



10. THE "FAIRY SHRIMP" (Chirocephalus diaphanus), MALE. 



x 2 - 35 



11. Estheria obliqua, ONE OF THE CONCHOSTRACA - - 36 



12. Daphnia pulex, A COMMON SPECIES OF "WATER-FLEA." 



MUCH ENLARGED - - 37 



13. SHELLS OF OSTRACODA. MUCH ENLARGED - 38 



14. Cyclops albidus, A SPECIES OF COPEPOD FOUND IN FRESH 



WATER - - 39 



15. Nebalia bipes. ENLARGED - 44 



16. Mysis relict a, ONE OF THE MYSIDACEA. ENLARGED 47 



17. Gnathophausia ivillemoesii, ONE OF THE DEEP-SEA MYSI- 



DACEA. HALF NATURAL SIZE - - 48 



8. Diastylis goodsiri, ONE OF THE CUMACEA. ENLARGED - 49 



ix 



