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running over the outer edge
Most of the members of the phacopids are characterized by large compound eyes
may have been specialized to feed on mollusks
Dinosaurs in West Virginia
Bison antiquus, brain endocast Gallimimus running over the outer edgeThis is a brain endocast of the the extinct Bison. An endocast or endocranial cast is a cast made of the mold formed by the impression the brain makes on the inside of the neurocranium (braincase), providing a replica of the brain with most of the details of its outer surface. Endocasts can also form naturally, when sediments fill the empty skull, after which the skull is destroyed and the cast fossilized. Scientists are increasingly utilizing