10 
Qenus — OMPHYMA, Baffinesque and Clifford. 
Omphtma Mtjuchisoni ? Milne Bdwards and Haime. 
Cystiphyllnm silurense (pars), Lonsdale, 1839, in Murcliison’s Silurian System, p. 691, pi. 
10 bis, fig. 2 exclusis). 
Omphynia Mlircllisoni, Milne Edwards and J. Haime, 1851, Polyp. Loss. Terr. Pal., p. 402. 
,, Id. Id., 1852, Mon. Brit. Foss. Corals, p. 289, pi. 67, fig. 3. 
„ Salter, 1859, in Murchison’s Siluria, p. 534, pi. 38, fig. 2. 
I am not quite certain tliat tlie specimen submitted to me really 
belongs to the species to which I have referred it, because it is only an 
external cast, of which, however, the resemblance to the individual figured 
by Milne Edwards and J. Haime is striking. As in the last-mentioned, it is 
composed of two adjoining branches. 
Horizon and Localities. — Quartzite of Burrawang. 
G'^^^^5_CYATH0PHYLLUM, Goldfiiss. 
Cyathophtllum apticulatum, Wahlenherg. 
Madrepora articulata, Wahlenberg, 1821, Nova Acta Soc. IJpsala, VIII, p. 87. 
Cyatliophyllum vermiculare, Hisinger, 1837, Leth. Suecica, p. 102, pi. 29, fig. 2. 
„ arliculatum, Id., 1837, Hid., p. 102, pi. 29, fig. 4. 
J, CCespitosum, Lonsdale, 1839, in Murchison’s Silurian system, p. 690, pi. 16, 
fig. 10. 
„ articulatuni , Milne Edwards and J. Haime, 1852, Mon. Brit. Foss. Corals, 
p. 282, pi. 67, fig. 1. 
,, ,, Salter, 1859, in Murchison’s Siluria, p. 533, pi. 38, fig. 10. 
This coral is fasciculate, and composed of suhcylindrical corallites, close 
set. These are characterised by their contractions and succeeding well- 
marked sw’ellings ; they are covered with a very thin epitheca, which makes 
the costae very noticeable and accentuates the little depressions with which 
they are ornamented ; these septa, about sixty in number, are alternately a 
little thinner the one than the other. The corallites are from twelve to 
fifteen centimetres long, and are from one to 1’5 centimetres in diameter. 
Horizon and Localities. — I have no doubt about the determination of 
this species, which has been found in Europe in the Upper Silurian of Dudley, 
Gothland, and Esthonia, and in Australia in the quartzite of Burrawang. 
