393 
BiTAiiTE Shells. 
Mijacites 
St/ssoarca 
Solemya 
Area 
llinnites 
Oytherea 
Gyprina 
l^anopoBa 
Inoceramus 
Myoconcha 
Pecten 
Teredo in fossil wood. 
“ I believe Ibe whole of these are Cretaceous (Lower) and one perhaps Neocomian. 
Most of the species are new, but to figure and describe them would serve no good pur- 
pose, as they are all apparently in drift nodules, and cau hardly have been found in situ. 
I shall always have much pleasure in rendering you what assistance I can in these 
matters, but I would at the same time point out the uselessness of sending home any 
fossils for dete-rmination which are simply drifted surface specimens. The perplexing 
mixture of forms from AVollumbilla, previously described by Moore, arose from this 
collection of specimens from drifted nodules. The whole series will be returned to the 
Colony as soon as Mr. Carruthers has completed his investigation of the suppioscd speci- 
mens of Glossopteris.” 
Mr. Taylor continues No mention is made of some fine Ichthyosaurus 
vertebrsB discovered on the Walsh by Warner (one of our party), or of my Crustacean. 
“ The Mitchell River bed is composed (at Camp 14) of thin grey shales and brittle, 
conchoidally fractured, marly mudstones, full of large and small flattened globular 
concretions. The mudstones are full of Dentaliuni (?) and small bivalves (Leda ?), 
and the concretions of large bivalves and Cephalopoda {Pecten, Ammonites, &c.) always 
lying on their flat surfaces. That they have been formed in situ by segregation of the 
calcareous matter round the decomposing animal, there cau bo no doubt. The idea of 
their drift origin is simply preposterous.” 
Calcareous nodules, such as are described by Mr. Taylor, are of common occur- 
rence among the shale beds all over the Rolling Downs, and I have.no doubt that Mr. 
Taylor’ s fossils were found in situ. At the same time the misconception on the part of Mr. 
Etheridge probably arose from the imperfect data concerning the occurrence of the 
fossils with which he was furnished. As a matter of fact, I am given to understand that 
the Ze/i%osOT(rtfSTertebrEe,fromwhat cause I cannot tell, never reached Mr. Etheridge. 
The late Mr. R. Daintroo remarked * that “ all the great plahm of Queensland 
westw'ard of the Main Range consist of subaerially decomposed Oolitic and Cretaceous 
shales, limestones, and sandstones and, further—" The only variety in the lithological 
character of the Flinders and Thompson Rivers Mesozoic rocks is the change from 
shale to fiue-gi’ained sandstone in the alternating beds, the shale greatly predominating^; 
its lino of bedding marked by thin bands and nodular layers of argillaceous limestone.” 
“One other peculiarity in the strata forming the series is the presence at intervals 
of thin layers of limestone having the well-known cone-in-cone structure. This has 
more the appearance of a chemical precipitate than a mechanical deposit, and contains 
no fossils. Its analysis gave ; — 
Insoluble in hydroclilorio acid 
Aminonia-procipitate 
Carbonate of lime 
Undetermined constituents... 
14-920 
4-860 
75-458 
4-762 
100-000 
Quart. Journ. Geol. Soc. 1872, xxviii., p. 282, 
