The use of triremes (ships with triple arrangement of oars) did not become common among the Greeks till the earlier part of the fifth century B.C. This was the typical Greek warship of the period of the Peloponnesian war, and the arrangement of the rowers in it has given rise to much controversy. The crew (according to one view) consisted of two hundred rowers, sixty-two on the highest tier ([Greek: thranitai]), fifty-four on the middle ([Greek: zygitai]), and fifty-four on the lowest ([Greek: thalamitai]), as well as thirty who were apparently stationed on the highest deck ([Greek: perineô]). The best ancient representation of the rowers in a trireme is that given on a relief in Athens, of which a cast is shown here (No. =74=; Case 94). The upper oars pass over the gunwale, the second and third lines (if these are oars) through port-holes. In the trireme the ram was of the greatest importance, and much attention was devoted to strengthening it. An excellent illustration of the prow of a trireme is to be seen in the terracotta vase from Vulci (No. =75=; fig. 26). Here are an upper and a lower ram, each armed with three teeth; the curved ornament above the ram has been broken away. The projections on either side of the handles of the vase, decorated with a woman's head, would serve as a protection to the oars. The eye on the side is a prominent decoration in Greek ships. It is seen on the ship painted on the vase B 508 in Case 95 (No. =76=), from which the diver is preparing to jump, and has survived even to the present day, for eyes are still found painted on the bows of Mediterranean fishing boats. The eyes are often supposed to be a defence against the evil eye, but the exact position they occupy on each side of the prow is suggested by the almost inevitable analogy between the prow of a vessel and the head of an animal. Roman ships did not differ very materially from Greek ships, but a special class of swift ships with two banks of oars was adopted from Liburnian pirates who inhabited the islands off Illyria, and these ships were called Liburnian galleys. A figure-head in bronze from a Roman ship, found in the sea off Actium, is shown in Case 96 (No. =77=). It represents Minerva, and probably belonged to some ship sunk in the great battle between Octavian and Antony in 31 B.C. [Illustration: FIG. 25.--TERRACOTTA MODEL OF MERCHANT-SHIP (NO. 71). L. 12 in.] [Illustration: FIG. 26.--VASE IN THE FORM OF A PROW OF A TRIREME (NO. 75). L. 8 in.] A fragment of a relief from a sarcophagus shows a Roman trireme, with a figure of a swan in relief on the prow (No. =78=). [Illustration: FIG. 27.--ROMAN SHIP ENTERING A HARBOUR (NO. 79). Diam. 4 in.]