 The vertebrae of the middle tail have a tongue-shaped process at the top of the front face of the vertebral body; this is an extension of the floor of the neural canal.The chevrons of the front tail vertebrae have shafts of which the lower ends are flattened from the front to the rear instead of transversely.The lower process of the ilium, to which the pubic bone was attached, features on the outer surface of its base a triangular depression.