OHAPTEE XV. 
THE PBEMO-CAEBONIEEEOUS SYSTEM— 
the middle BOWEN EOEMATION OHTSIDE OP THE TYPE DISTRICT, 
Including Nbbo, Mackat, Banana Cheek, Cbaoow Creek, Nogoa Eitee, Speingsurb, 
Logan Downs, and Eoper Creek. 
In the neighbourhood of Mackay generally the Permo-Carboniferous rocks are 
■Well represented. It will be convenient to give in this place a short account of the 
Middle or Marine Eormation of the Bowen Eivor as developed in the Nebo District. 
Three miles south-west of Mount Britton Township, on a ridge near Mr. 
■Richards’ Selection, some beds of ferruginous, and in part calcareous, sandstones are 
®een dipping to the north-west. They are full of fossils of the type of the Middle 
or Marine Series. These are casts of numerous shells, &c., of which I made a large 
^llection in 1887. The collection has been supplemented by Mr. A. L. Morisset, Mr. 
Hull, and others. Among the fossils identified by my Colleague are — 
Platyorinus ? nux, Eth. fil., PI. .38, fig. 3. 
Spirifera, sp. ind., PI. 38, figs. 4, G. 
S. Strzelechii, De Kon., PI. 10, fig. 37. 
Spiriferina duodecemcostata, McCoy, PI. 44, fig. 12. 
Martinia suhradiafa, G. B. Sowerby, PI. 11, fig. 14. 
Martiniopsis Darwinii, Morris, PL 9, figs. 13, 14 ; PI. 39, figs. 5, 7. 
Productus cora, D’Orb., PI. 12, fig. 14 ; PI. 13, fig. 1 ; PI. 38, fig. 11. 
P . hracliytlicerus, O. Sowerby, PL 12, figs. 10-13 ; PL 13, fig. 5; PL 44, 
fig. 14. 
P. mbquadmtm, Morris, PL 38, figs. 7-10 ; PL 40, fig. 5. 
P., sp. ind. (e), PL 37, fig. 18. 
Ohonetes, sp. ind. (d), PL 37, fig. 19. 
Deltopecten illawarrensis, Morris, PL 41, fig. 3 ; PL 44, fig. 2. 
Modiomorplia mytiliformis, Eth. fil., PL 14, fig. 5 ; PL 40, fig. 4. 
Orthoceras, sp., PL 15, fig. 1. 
A species of Fenestella is also common. 
g -^Le track from Mount Britton to Eungella passes by the Moonlight Diggings, 
Mount Eobert and west of “ The Stalk.”* Just beyond Mount Eobert, fossils 
e same species as those at Eichards’ were seen on the road. 
^he Middle Formation in the Mackay District is described by Mr. Maitland, in 
fg Annual Eeport for 1889, as “made up mainly of sandstones and shales, and 
roek sandstones, with occasional contemporaneous and intrusive sheets of dioritic 
A few seams of coal occur among these beds. 
®ide Hanana Creek, a tributary of the Dawson (Lat. 24° 30', Long. 150°) , a con- 
^ 9'ddition has been made to the fauna of the Middle Formation by the labours 
r. C. 'W. de Vis, Mr. If. Mackay, and the late Mr. James Smith. These are — 
Terebraiula sacculus, Martin. 
Spirifera lata, McCoy. 
Runs Map of Leichhardt District and Runs Map of North and South Kennedy, sheet 2. 
