Complex sentence: The shell was a two-part carapace on the upper surface of the body; the larger half covered "Cyamodus" from the neck to the hips and spreads out flat, almost encompassing the limbs.
Split into simpler sentences: The shell was a two-part carapace on the upper surface of the body. The larger half covered "Cyamodus" from the neck to the hips and spread out flat, almost encompassing the limbs.