Richard Swann Lull

1867 – 1957

• Organic evolution
• Organic evolution.
• A remarkable ground sloth
• A revision of the Ceratopsia or horned dinosaurs
• Fossils
• Organic Evolution
• The cranial musculature and the origin of the frill in the Ceratopsian dinosaurs
• The evolution of the Earth and its inhabitants
• The evolution of the earth and its inhabitants
• The evolution of the earth and its inhabitants
• The Evolution of the earth and its inhabitants
• The evolution of the elephant