55 
Genm—AMPLEXOPOBA, Ulrich, 1882. 
(fJoTirn. Cincinnati Soc. Nat. Hist., v., p. 154.) 
Amplexopoba ? KosTifCKii, Etheridge fil. and FoorJ, PI. 2, figs. 7-9a. 
■^niplexopora Koninoldi, Eth. fil. and Foord, Aim. and Mag. Nat. Hist., 1884, xiv., p. 178, t. 6, f. 3 a-c. 
Sj), Char, Corallum massive. Calicos polygonal in outline, with the angles 
I'ounded, minute and variable in size, somewhat thin- walled ; from three to four occupy 
tue space of 1 millimeter. Spiniforin oorallites placed at the angles of junction of 
®any of the cell apertures. Tabulto remarkably regular, horizontal, from 1 to 2 tube 
diameters apart. 
Ohs. The present species, like the others from the same locality, has undergone 
^ good deal of alteration by weathering and crystallisation, so as to obscure, in a measure, 
i'be structure of the organism. Tlio iii-lilling of the coral is calcite of fibrous structure 
(Arr.igonite ?), the fibres cutting the walls of the corallitos, as well as crossing the 
visceral cavities. 
Tlie first impression gained on examining thin sections of this coral was that it 
^ight be a Chastetes; but the presence of the spiniform corallites (provided, of course, 
6se structures have been correctly interpreted), sets this question at rest. 
Loc. Eegan’s, Northern Railway, thirty-one miles from Townsville. (JR.L.Jach.) 
Genus — TBACRYPOBA, Edw. and Raime, 1851. 
(Polyp, Foss. Terr. Pal., p. 305.) 
' Teachtpoea, sp. ind. 
Trachi/pom, sp. ind., Nicholson .and Eth. fil., Ann. and Mag. Nat. Hist., 1879, iv., p. 281. 
. Ohs. A single and badly preserved example has occurred in the Arthur’s Creek 
iinestone, which, although sufficiently good for generic identification, is in too ill- 
Preserved a condition to warrant us in attaching to it a specific description and name. 
The specimen is seated on the weathered surface of a piece of limestone, and 
ibits the vermiculate surface and non-septate calices characteristic of Trachypora. 
Loo. Arthur’s Creek, Burdekin Downs. (B. L. Jach.) 
Genus— 8TBIAT0P0BA, Rail, 1852. 
(Pal. New York, ii., p. 150.) 
Steiatopoea? uniseptata, sp. non., PI. 37, figs. 1, 2. 
p _ 8p. Char. Corallum small, dendroid, compiosed of bifurcating cylindrical stems. 
^ orallites thick-walled, the calices arranged in vertical rows separated by thickened 
erenchyma, with oval, oblique, cup-shaped a^ierturos, of more or less equal dimen- 
^ , tljg orifices below are circular and contracted, the distal wall invariably bearing 
^iiigle septal ridge. Pores small, not numerous, scattered. Tabula) ? 
Ohs. In some respects this little coral resembles Striatopora, as in the arrange- 
cells, and the form of their orifices. On the other hand, it differs widely 
sin ®®P®^^9,tion of the former by the interstitial coenenchyma, and in the presence of a 
geif ^ only; in fact, I much question the propriety of retaining it in this 
The single septum is a very constant character in each calice, as a vertical 
faC on the distal, on hinder wall, apparently descending far into the former. 
I have not obsenmd any definite trace of tabuloB, the m.aterial being too limited 
rid 
in 
to permit of the preparation of microscopic sections. In the weathered 
Hat specimen these delicate organs have been removed. Judging from a 
cent^^ ^^^ri.sverse section the corallites seem to have had well-developed walls in the 
of the corallum. and to pass outwards by a very gentle and gradual curve. 
