418 Notices of Memoirs—British Association— 
between contemporary formations in all parts of the world. This 
fact had been often remarked, but was usually dismissed as due to 
a number of local isolated coincidences of no special significance. But 
the coincidences are too numerous and too striking to be thus lightly 
dismissed. They are among the indications that the main earth- 
changes have been due to world-wide causes, which led to the 
predominance of the same types of sedimentary rocks during the same 
period in many regions of the world. 
The conditions that govern the geological evolution and general 
geography of the earth are probably due to the interaction between 
the earth’s crust and the contracting interior; they may take place 
as slow changes in the form of the earth, causing the slow rising or 
lowering of the sea surface, or the slow uplift or depression of regions 
of the earth’s crust; or they may give rise to periods of violent 
volcanic action in many parts of the earth, between which may be 
long periods of quiescence. The geographical effects of changes in the 
earth’s quivering mass affect distant regions at the same time. There- 
fore the landmarks of physical geology will probably be found to give 
more precise evidence as to geological synchronism than those of 
paleontology, on which we have hitherto had to rely. 
(To be concluded in our next Number.) 
IJ.— Bririss Association FOR THE ADVANCEMENT OF ‘SCIENCE. 
List or Trrnes of Papers READ IN Section C, Geotocy, Aueust 
isn mu) “Pawar, INGO A 
Presidential Address by Professor J. W. Gregory, F.R.S. (p. 409.) 
O. Fou-Strangways.—Geology of Country round Leicester. (p. 420.) 
Professor W. W. Watts, F.R.S.—The Geology of Charnwood Forest. 
Dr. F. W. Bennett.—The Felsitic Agglomerate of Charnwood Forest. 
Dr. B. Stracey—The North-West District of Charnwood Forest. 
. 420. 
Ae. Bebo’ —The Paleontology of the North Derbyshire 
Coalfield. (p. 421.) 
H. T. Ferrar.—Some Desert Features. 
Trias Report—Investigation of the Fauna and Flora of the Trias of 
the British Isles. 
(a) Dr. Smith Woodward.—On Labyrinthodon leptognathus, Owen. 
(6) H. C. Beasley.—F¥ootprints from the Trias. 
(c) J. Lomas.—Footprint Slab in Museum of University of 
Liverpool. 
(d) A. R. Horwood.—The Flora and Fauna of the Trias. 
(¢) L. J. Wills.—Fossils of the Lower Keuper of Bromsgrove. 
Professor H. G. Seeley, F.R.S.—On the Structure of the Mandible of 
a South African Labyrinthodont. 
T. O. Bosworth.—The Origin of the Upper Keuper. 
W. Keay & UM. Gimson.—The Relation of the Keuper Marl to the 
Pre-Cambrian Rocks at Bardon Hill. 
H. Bolton & C. J. Waterfall.—On the Occurrence of Boulders ot 
Strontia in the Upper Triassic Marls of Abbott Leigh, near Bristol. 
