CONTENTS. XI 



CHAPTER IX. 



SEA-WOKMS. 



PAGE 



General description. — Classification. — Out-door studies. — Serpula con- 

 tortuplicata. — Amphitrite .^geana. — Sabella tubularia. — Sabella 

 alveolata. — Terebella concliilega. — Nereis bilineata. — Aphrodite 

 aculeata 179 



CHAPTER X. 



NIGHT-LIGHTS AND ENTOMOSTRACA. 



Noctiluca miliaris. — Entomostraca. — Dr. Baird's account of their ha- 

 y^ bits. — Chirocephalus diapbanus. — Artemia salina. — Cypridse. — 



Cyclops quadricornis. — Lerneonema Sprattae 193- 



CHAPTER XI. 



CRUSTACEA. 



Nature and Construction. — Exuviation. — Casting limbs. — Metamor- 

 phoses. — The Prawn, Palsemon serratus. — The common Shrimp. 

 — The common Lobster 211 



CHAPTER XII. 



CRABS. 



Carcinus msenas. — Its habits. — ^Metamorphoses. — Cancer Pagurus. — 

 Soft Crab. — Observation's in a tank. — Galathea strigosa. — Porcel- 

 lana platycheles. — The Hermit Crab. — Its pugnacity. — Choosing 

 a house. — Caution. — INIetamorphoses 230 



CHAPTER XIII. 



WATER-INSECTS. 



Argyroneta aquatica. — Its Nests under Water. — Deposition of Eggs. — 

 General habits. — Dyticus marginalis. — Air investiture. — Breath- 

 ing. — Larva. — Feeding 247 



