CONTENTS. Xiii 



CHAPTER XVIII. 



STAR-PISHES, ETC. 



Page 



The Coral polypes The Lily-stars St. Cuthbert's beads Pen tacrimu euro- 

 pceus Rosy feather star Ophiuridce Brittle-stars Ophiocomo-rosula 

 British asteridae Uraster rubens Habits of this species Submarine Dan- 

 dos Sir John Dalyell Professor Jones Star-fish feeding on the oyster 

 Bird's foot Sea- star Luidia fragillissima Cushion-stars Professor 

 Forbes, ... ... ... ... ... ... ... $69 



CHAPTER XIX. 



SEA-URCHINS. 



Sea Urchins in the tank Growth of the Echinus -Its hedgehog-like spines 

 Suckers and pores Ambulacra! tubes - Professor Agassiz Movements 

 of the Echinus Pedicellariae Masticatory apparatus Common Egg 

 Urchin Echinus sphcera How to remove the spines 'Do you boil your 

 sea eggs?' The Green-pea Urchin The Silky-spined Urchin The Rosy- 

 heart Urchin, ... .. ... ... ... ... 287 



CHAPTER XX. 



THE SEA-CUCUMBER. 



Its unattractive appearance out of water Trepang Several varieties eaten 

 by the Chinese Common Sea Cucumber Habits of the Holothurise 

 Their self-mutilation and renewal of lost parts, ... ... ... 30 



CHAPTER XXI. 



THE APLYSIA, OR SEA-HARE. 



Anecdote The Sea Hare plentiful at North Berwick Its powers of ejecting 

 a purple fluid at certain times Sea Hares abhorred by the ancients 

 Professor Forbes Spawn of the Aplysia, ... ... ... ... 307 



