Anecdote of the Potter--Its cephalic tentacula--Construction of its tubular dwelling--_Terebella littoralis_--Curious anecdote--Branchial organs of this annelid, 189 CHAPTER XIII. ACALEPHÆ (MEDUSÆ, OR JELLY-FISH). Introduction--Jelly-fish--Whales' food--Lieutenant Maury--Appearance of the Greenland Seas--Sir Walter Scott--The girdle of Venus--The Beröe--_Pulmonigrade acalephæ_--Portuguese man-of-war--_Hydra-tuba_--Alternation of generations--Dr. Reid--_Modera-formosa_--_Cyanea capillata_--Conclusion, 201 CHAPTER XIV. DORIS EOLIS, ETC. Anecdote--Young Dorides--Doris spawn--_Nudibranchiate gasteropoda_--Dr. Darwin--Mr. Gosse--A black Doris--_Bêches de mer_--A Chinese dinner--Bird's nest soup, and Sea-slug stew, 221 CHAPTER XV. THE CRAB AND THE DAINTY BEGGAR. Anecdote--The Pholas and Shore-crab--The _hyaline stylet_--The dainty beggar--The gizzard of the Pholas--Of what use is the stylet? 233 CHAPTER XVI. THE PHOLAS, ETC. (ROCK-BORERS). Pholades at home--Habits of the Pholas--_P. crispata_--The pedal organ--Finny gourmands--How is the boring operation performed?--Various theories on the subject--Mr Clark, Professor Owen--The Pholas at work--The boring process described from personal observation--Author's remarks on the subject--Pholas in the tank--Conclusion, 241 CHAPTER XVII. THE SEA-MOUSE. The Sea-mouse--Bristles of the aphrodite--Its beautiful plumage (?)--Its weapons of defence--The spines described--Shape of the aphrodite, &c., 263 CHAPTER XVIII. STAR-FISHES, ETC. The Coral polypes--The Lily-stars--St. Cuthbert's beads--_Pentacrinus europæus_--Rosy feather star _Ophiuridæ_--Brittle-stars--_Ophiocomo-rosula_--British asteridæ--_Uraster rubens_--Habits of this species--Submarine Dandos--Sir John Dalyell--Professor Jones--Star-fish feeding on the oyster--Bird's foot Sea-star--_Luidia fragillissima_--Cushion-stars--Professor Forbes, 269 CHAPTER XIX. SEA-URCHINS. Sea Urchins in the tank--Growth of the Echinus--Its hedgehog-like spines--Suckers and pores--Ambulacral tubes--Professor Agassiz--Movements of the Echinus--_Pedicellariæ_--Masticatory apparatus--Common Egg Urchin--_Echinus sphæra_--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 Holothuriæ--Their self-mutilation and renewal of lost parts, 301 CHAPTER XXI.