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Cephalopods

• Class Cephalopoda
• Key to the Orders and Sub-orders of Cephalopods
• Family Argonautidae
• Argonaut
• Family Octopodidae
• Devil-fishes
• Family Spirulidae
• Family Sepiidae
• Family Loliginidae
• Family Ommastrephidae
• The Giant Squids
• Family Nautilidae
• Chambered Nautilus
• By Oliver Wendell Holmes