Contents 



PAGE 



not requisite — The Clam — Food and money — Carpet-shells 

 —The Pullet— Rock Venus— Hock-borers— Red Nose— A 

 molluscan hedgehog — Various Cockles — Common Cockle . 118 



IX. GAPERS, PIDDOCKS, AND SHIPWORMS 



Shells that will not shut — Sunset-shells — Old Maid, a 

 mud dweller — Its remarkable siphons, always extended— ^ 

 Basket-shells— Otter-shells or " Clumps "—Eaten in Herm 

 • — Razors of sorts — Why the hinge is not central — Razors 

 not so sharp as mussels — Saxicava — Flask-shell — Piddocks 

 — How rocks are broken up — ]Multivalve shells — Paper 

 Piddocks — Wood Piddock — Ship-worms — How wreckage is 

 disposed of — Pandora — Lantern-shells — Skye Gaper . 144 



X. TUSK-SHELLS, MAIL-SHELLS, AND LIMPETS 



Elephant's - tusk — A connecting link — ]Mail-shells — A 

 shell of plates — Tortoiseshell Limpets — Other Limpets — 

 Common Limpet and its stronghold — How it adheres — Its 

 excavating powers — Its homing habit — Blue-rayed Limpet : 

 its two forms — Slit-limpets and Keyhole-limpets — Ormer 

 or Sea Ear — Its perforated shell . . . .ITS 



XL TOP-SHELLS AND PHEASANT-SHELL 



Dolphin -shells — LTmbilicus and operculum — Toii-shells 

 — Pheasant-shell — A tiny gem — Fresh-water Nerite — Prob- 

 able origin from a marine form . . . .199 



XIL NECKLACE-SHELLS AND WINKLES 



Violet Sea-snail and its egg-raft — Eyeless derelicts — 

 Wentletraps or Staircase-shells — A forty-guinea shell — 

 Aclis-shells — Necklace-shells and their strange egg-bands 

 ■ — How shells are reduced — Marsenia : a snail that is seen 

 through — Protective resemblance — Velvet-shell — Bonnet 

 Limpets — Hungarian Cap — Cup - and - Saucer Limpet — 

 A quaint interior — Winkles — Dwarf Winkle and its 

 resemblance to bladders of Fucus— Rough Winkle — Is it 

 becoming a land-snail ? — An object-lesson in evolution — 

 Periwinkle— Chink-shells . . . . ,210 



