FIG. 16 in Turonian-Santonian echinoids from Egypt

FIG. 16. — Biometric data on Toxaster dakhlensis n. sp., from the Turonian of Wadi Dakhl, showing the relation between test length (L) and each of test width (W); test height (H); length of petal I or V (LI), and number of pore pairs in petal I or V (NI; filled quadrangles, solid line); and length of petal II or IV (LII), and number of pore pairs in petal II or IV (NII; empty quadrangles, dashed line).