55 
2. CYATnoPHYLLUM OBTOPTUM, Milne Ediocivds and J. Haime. 
Sh'Onihodes vermicular e, Lonsdale, 1840, Trans. Geol. Soc. London, V (2), p. 703, jd. 58, 
fig. 7 {non. Gyatli. vermiculare, Groldf.). 
„ vermicidaris, J. Phillips, 1841, Pal. Loss. Cornwall, p. 11, pi. 7, fig. 14. 
Cyathopliyllum ohtortmn, Milne Edwards and J. Ilaiine, 1851, Polyp. Eoss. Terr. Pal., 
p. 56G. 
„ ,, Idem, idem, 1852, Brit. Eoss. Corals., p. 225, pi. 59, fig. 7. 
Corallum very long, generally siibcylinclrical, rarely turlnnate, covered 
with a somewhat thin epitheca ; growth ridges large and little regular, 
Calice circular. Thirty to forty very thin primary sej)ta, bending at some 
distance from the outer edge and twisting with each other at the centre ; 
these se^^ta alternate with an equal number of shorter septa, whose length is 
but a third of the total diameter of the corallum. The outer portions of the 
visceral chambers are occupied by a considerable number of vesicles, wliich 
can be seen with the greatest ease. 
Dimensions. — One of the Australian specimens that I have before me 
measures eleven centimetres, though it has been broken off at both ends. I 
am of opinion that when perfect it must have measured at least twenty 
centimetres in length. The diameter is four centimetres. 
Horizon and Localities. — This species has been founded at Moara 
Creek, near Yass, and at Quedong in a greyish limestone. In England it is 
found in the neighbourhood of Torquay. 
3. Cyathopuyllum daycnoniense, Lonsdale. 
Cystipliyllum Damnoniense, Lonsdale, 1840, Trans. Geol. Soc. London, V (2), p. 703, 
pi. 58, fig. 11. 
„ „ J. Phillips, 1841, Pal. Eoss. Cornwall, p. 9, pi. 4, fig. 11. 
Cyathopliyllum Damnoniense, Milne Edwards and J. Haime, 1851, Polyp. Eoss. Terr. 
Pal, p. 371. 
„ „ Idem, idem, 1852, Brit. Foss. Corals., p. 225, pi. 50, fig. 1. 
Corallum simple, subturbinate, more or less curved, epitheca thin, 
growth ridges faintly marked. Septa about one hundred in number, alter- 
nately very unequal, very thin and slightly bent towards the centre. Vesicular 
tissue very compressed, slightly regular, [vescicles] appreciably smaller and 
more numerous in the outer region. 
