Bears, wild boars, hares, wolves, foxes and wild cats are very common, and in the north sables are found in great numbers.
Wild boars are also found in mountainous and forest districts.
The remains of numerous other villas lie along the ancient coast-line (which was half a mile inland of the modern, being now marked by a row of sand-hills, and was followed by the Via Severiana), both north-west and south-east of Tor Paterno: they extended as a fact in an almost unbroken line along the low sandy coast - now entirely deserted and largely occupied by the low scrub which serves as cover for the wild boars of the king of Italy's preserves - from the mouth of the Tiber to Antium, and thence again to Astura; but there are no traces of any buildings previous to the imperial period.
They are specially distinguished by the great development of the anterior half of the zygomatic arch of the skull, and by the presence in the boars of a horny protuberance of the skin in front of each eye, which overlies a tuberosity on the nasal bone; the molars are also small and simple, and the anterior premolars are generally shed at an early stage of life.
A large part of the province was given up to pasture, and the mountains were covered with forests, which abounded in wild boars, bears and wolves.