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21 Tlie coral called L. basdltiforme does not appertain to the European species of that name ; neither does it belong to the genus, nor is it Carbon iferous. I have already explained 1 that Carboniferous rocks do not occur, so far as we know, on the Murrumbidgee River, the locality from which the specimen was said to have come. The coral so named by De Koninck I have collected from the blue-black Siluro-Devonian (so-called) limestone of Cave Elat, at the junction of the Murrumbidgee and Goodradigbee Rivers. It is a Cyathophyllum, and only on a casual examination could have been mistaken for L. basaltiforme. The locality of De Koninck’s Lithostrotion irregulare, as given in his work, is certainly a Carboniferous one; but I cannot avoid the impression that a mistake has arisen in so assigning the specimen. It is suspiciously like, in general appearance, a coral I have described 2 as Tryplasma Lonsdalei, from the Upper Silurian of Hatton’s Corner, near Yass. Genus—CYATHOPHYLLUM, Goldfuss, 1836. (Petrefacta, I, p. 54.) Cyathophyllum ? zaphrentoides, sp. nov. PI. X, Pigs. 4-6. Sp. Char.—Corallum of medium size, conical, compressed towards the base; section circular. Septa forty to forty-two, with an equal number of secondary lamellae ; primary septa generally straight, here and there a little curved, proceeding direct to the centre of the calice, untwisted; secondary septa rather less than half the length of the primary; dissepiments highly developed, extending inwards for half the length of the primary septa, irregular in direction, convex outwards, oblique, or at right angles to the septa; vesicles small and irregular in shape; stereoplasma well developed forming an outer zone * * rather more than a third as wide as the corallum. Tabulate area very small, if present. Ohs.—The systematic position of this coral is somewhat ambiguous. The quantity of vesicular tissue would indicate Cyathophyllum as its genus, whilst the manner in which the septa approach the centre, and the slight evidence of tabula) point to Zaphrentis. 1 See Foot-note, p. 6. * Records Geol. Survey N. S. Wales, 1890, II, Pt. 1, p. 15, t. 1, f. 1-6.