 On the underside of the chest, the gastralia of "Cartorhynchus" were thin and rod-like, unlike the flattened "basket" of "Sclerocormus", but both lacked another pair of symmetrical elements at the midline of the body.The limbs of "Cartorhynchus" were poorly ossified (only three digits of the hand were ossified) with widely-spaced bones, particularly between the wrist bones (carpals) and the digits, suggesting the presence of extensive cartilage in the limbs.This would have made the limbs flipper-like.