Note 155 — INTRODUCTION (continued 2)

Fig. 39 is from a photograph taken by Dr. Lewis L. Forman and furnished by Dr. A. S. Cooley. Owing to its change of function, in Roman times the orchestra was sometimes known as the κονίστρα (= the Latin arena); owing to its change of shape, it was sometimes called σῖγμα from its resemblance to the semicircular form of the Greek letter Ϲ.