. Bulletin of the Natural History Museum Geology. no BARON-SZABO. Fig. 6 Stages of corallite division in Cladophyllia minor Beauvais. 1975. upon which the model of 'septal division' was established by Morycowa & Roniewicz (1990): 1 = initial stage characterized by fusion of septa; 2 = advanced stage with new septa on the wall surface developed; 3 = late stage with median wall line marked and a constriction developing between two corallites. Scale bar = 2 mm. Cladophyllia stewartae Wells, 1944 PI. 4, fig. 3, PI. 6, fig. 3 * 1944 Cladophyllia stewartae Wells: 442. pi. 74, figs 2, 3. 199
. Bulletin of the Natural History Museum Geology. no BARON-SZABO. Fig. 6 Stages of corallite division in Cladophyllia minor Beauvais. 1975. upon which the model of 'septal division' was established by Morycowa & Roniewicz (1990): 1 = initial stage characterized by fusion of septa; 2 = advanced stage with new septa on the wall surface developed; 3 = late stage with median wall line marked and a constriction developing between two corallites. Scale bar = 2 mm. Cladophyllia stewartae Wells, 1944 PI. 4, fig. 3, PI. 6, fig. 3 * 1944 Cladophyllia stewartae Wells: 442. pi. 74, figs 2, 3. 1990 Cladophyllia stewartae Wells; Morycowa & Roniewicz: 168. Material. AZ 375; AZ 575; AZ 579; AZ 643; AZ 973. Measlri mi NTS. d: (*) 3^* mm; s: 24 (*+s4); size of the colony: up to 17 cm in diameter. Description. The corallum is phaceloid, with corallites that are circular or slightly elongated in outline and having a diameter of 3 mm on average. Budding is due to 'septal division' (sensu Morycowa & Roniewicz. 1990; see Fig. 6). Costosepta are compact, straight, u ith lateral surfaces that are covered by sharply pointed or rounded granules, and are arranged in 3 complete cycles in 6 systems. Frequently, the beginning of a fourth cycle is present. Septa of the first two cycles reach the centre of the calice, where their inner ends may fuse. A trabecular, styliform, or sublamellar columella can be free or joined w ith oldest septa. Septa of the third cycle are distinctly thinner, reaching about three-quarters the length of the oldest ones. Youngest septa are very small and thorn-like. Anastomosis can be observed frequently. The wall is septothecal. Endotheca is made of tabulate dissepiments in the axial part of the corallite. In the peripheral region of the calice large vesicular dissepiments occur. Septal micro- structure consists of simple minitrabeculae, forming dark axial lines. REMARKS. In having a calicular diameter of 3 mm on average with a septal development of
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