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PLATE IX. Fig. 1. Fig. 2. Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Fig. 13. Fig. 14. Fig. 15. Fig. 1G. rig. 17. Fig. 18. Fig. 19. Fig. 20. Page. Zaphrentis Culleni, Eth. fil. ... ... ... ... 13 A much-curved corallum, showing the slight accretion swellings, x J-. A less-curved corallum. A much-curved corallum, with constricted base and delicate rugrc, x J. A small cornute example, hut little curved, x 2. Transverse section below the calice entirely filled with stereoplasma, x 3. Another section in which the loculi are partly filled only, x 3. Section with the calice, with primary and secondary septa, x 3. Zaphrentis gregoriana, De Koninck (?) ... ... ... 11 An internal cast of a corallum with impressions of the epithecal spines on the adjoining matrix, x 2. Impression of the exterior of a corallum, with the imprints of the epithecal spines. Amplexus, sp. ind.... ... ... ... ... 7 Cast of a portion of a corallum, from which the whole of the calcareous matter has been removed, showing the position of tabu he, x 2. Zaphrentis, arundinaceus, Lonsdale, Sp. ... ... ... 9 Calice, naturally weathered, x J. Lower fractured end of the same specimen at one and a quarter inches, to show similar characters to PI. VIII, Fig. 2, x j. A reversed corallum, to show the irregular vesicular tabuhe. Zaphrentis phymatodes, Eth. fil. ... ... ... ... 15 Side view of corallum, with obtuse tubercles. A few of the tubercles seen on Fig. 14 highly magnified. (N.B.—The stellate appearance is too highly intensified.) The upper part of the corallum, with the septa gathering towards the centre, and the loculi partially filled, x jr. The lower portion of the same, with the loculi further filled with stereoplasma, x Campopliyllum columnare, Eth. fil. Corallum, side view. Transverse section, showing tabula;, dissepiments, and central tabulate area, with rather vesicular tabulae, x Transverse section', with a large tabulate area, x Figs. 1- 7, 18-20, from Binge Berry, Bouchel Brook. 8-13, „ Shoalhaven District. 14-17, „ Mulbring.