84 
THE GEOLOGIST. 
after having been more or less buried in sediment; but that, unlike most 
others, it remained iiollow for some tiiiu; in the soil of a forest, receiving small 
qtiantities of eartiiy and v(^getable matter, falling into it, or washed in by rams. 
In this state it was jirobably a places of residence for tiie snails and mjriapods 
and a trap and tomb for the rej)tiles ; though the presence of co])rolitic matter 
would seem to show that in some mstanees at least the latter could exist for a 
time in their underground prison. The oceiuTcuce of so many skeletons, with 
a lumdred or more specimens of laud-snails and myriapods, in a cylinder only 
fifteen inches in diameter proves that these creatures were by no means rare in 
the coal-forests ; and the conditions of the tree with its air-breatliing inhabitants 
implies that the Sigillarian forests were not so low and wet as we are apt to 
imagine. 
The little land-shell, specimens of which with the mouth entire have now oc- 
curred to the author, is named by him Pupa veiusfa. Dr. Dawson found entire 
shells of Fki/m hetcrostroplia in the stomach of Menohranclms lateralis, and 
hence he supposes that the Pupm may have been the food of the little reptiles, 
the remains of which are associated with them. 
Two examples of Spdrorbis carhonarms also occiuTcd ; these may have been 
drifted into the hollow trunk whilst they were adherent to vegetable fragments. 
The Myriapod is named Xylolnm Sigillarirp, and regarded as bemg allied to lulus. 
The reptilian bones, scutes, and teeth referable to Bendrerpeton Acadinnum 
bear out the supposition of its Labyrinthodont afBnitics. Those of the new 
genus, Ili/lonomus, established by Dr. Dawson on the other reptilian remains, 
indicate a type remote from Archecjosanrm and Lahyrinthodon, but in many 
respects approachmg the Lacertians. The three sjjecies determined by the 
author are named U. Li/ellii, H. aciedentatus, and H. }Fymani. 
4. " On the Occurrence of Footsteps of Chirothcrium in the Upper Kenper 
of Warwickshire." By the Kev. P. B. Brodie, F.G.S. 
True Chirotherian feetsteps do not appear to have been hitherto met with in 
the Keuper of Warwickshire ; but a specimen of Kenper sandstone showing 
the easts of a fore- and a hind-foot of Chirothcrium was lately turned up by the 
plough at Wliitley Green, near Henley-in-Arden. The breadth of the fore-foot 
IS about two inches, the hind-foot is four and a-half inches across. As the 
New Red sandstone of Cheshire, so well known for its fine Cliirotherian foot- 
tracts, certainly belongs to the upper part of the New Red series, it may now 
be further correlated with the Upper Keuper of Warwickshire, the latter 
having yielded true Chirotherian foot-prints. 
Geologist's Association, Ordinary Meeting, 5th Dec., 1859. Rev. 
Thomas Wiltshire, M.A., F.G.S., President, in the chair. 
The president stated that since the last meeting the Association had lost a 
valuable friend in the person of John Brown, Esq., E.G.S., who had prepared a 
paper which was to have been read that evening. Under these circumstances 
the committee had thought it respectful to the memory of Mr. John Brown, 
that his paper (which had been forwarded to the president) should not be read 
until the next meeting in January. It was announced that Professor Temiant, 
F.G.S., had kindly volunteered at very short notice to give a lecture on 
siliceous nodules in the various formations. 
Professor Temiant commenced by some observations on the large proportion 
in which silica enters into the composition of rocks, constituting one-half part 
of granite, one-third part of syenite, nine-tenths of quartz, and tliree-fourths of 
greensand. He then described the enormous amount of silica in the flints of the 
upper chalk, and called attention to the peculiarity which distinguishes the 
beds of flints in Kent and Sussex from those of Yorksliire. In the former they 
