Labels:animal | mammal | bone | fossil | skull | dinosaur OCR: SOLID FRILL Unlike other ceratopsids, such as Styra cosa urus and Chasmosaurus, Triceratops' frill bone was thick and solid, BROW HORNS and used as protection against During the dinosaur's predators and rivals. lifetime, the bone was encased in a hard layer of horn, ending in a sharp tip. NOSTRIL CAVITY This cavity, called a naris, was the external opening of the nasal passages. SMALL EYE SOCKET Eyes were well protected because they were set deep I inside the eye sockets.
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