. The Quarterly journal of the Geological Society of London . and Urocordylus. The Middle-Co al-measube genera are only 3-—Anihraeosaurus,Megalerpeton, and holiderjpeton. Loocomma and Pteroplax occur in both Lower and Upper Coal-measures. We are chiefly indebted to Professors Huxley and Miall forelaborate researches into the structure and affinities of the extinctorder Labyrinthodontia, a group eminently characteristic of Carbo-niferous time; for, with the exception of Bhiyiosaurus from the Liasand the Jurassic Brachyops, no remains of this order have hithertobeen discovered in rocks younger t
. The Quarterly journal of the Geological Society of London . and Urocordylus. The Middle-Co al-measube genera are only 3-—Anihraeosaurus,Megalerpeton, and holiderjpeton. Loocomma and Pteroplax occur in both Lower and Upper Coal-measures. We are chiefly indebted to Professors Huxley and Miall forelaborate researches into the structure and affinities of the extinctorder Labyrinthodontia, a group eminently characteristic of Carbo-niferous time; for, with the exception of Bhiyiosaurus from the Liasand the Jurassic Brachyops, no remains of this order have hithertobeen discovered in rocks younger than the Trias. 236 PKOCEEDINGS OP THE GEOLOGICAL SOCIETY. Table XVI.— Carboniferous. :j«tfl. satoadg S9iriSB9ra-[B0Q 0IPPTH mm <* •sganseatti-poQ « (UN wo qu°tom •9no;s9raxr[snoa9jiuoqa^o ocy S9-[Bqg 9uo;s -9UIFJ J9M0n[ „° «?» m1^ ^£ <n£ Tf<o ^ ; •saiogdg co h ^ co cm t« b- -<t< cq CO rHT-lCn rl H IM i—! 05 © CO CO CO Ol CO 8J9U90 •^O^CqcOOCOCOCOClCOr^OT-HCOr-iCi 00 r-( t-I CO CO r-H CO N (N H T(l C<». ANNIVERSARY ADDRESS OF THE PRESIDENT. 227 The Extension of the Older or Paleozoic Bocks below theNewer or Secondary Formations. The position and extension of the Palaeozoic rocks beneath thenewer formations of the British Islands is a problem of deep interest,and is now occupying much attention in consequence of the factsbrought to light by the numerous trials lately made either for thesupply of water or in search of minerals. It may be said that eversince the remarkable trials for water at Harwich and Kentish Town,and also the still more remarkable generalizations (almost predic-tions) of R. Godwin-Austen, Esq., in 1856*, and Prof. Prestwich in1872 f, with reference to the possible extension of the Coal-measuresbeneath the south-eastern part of England, the minds of pure geolo-gists have been excited by speculative views, and desires to arriveat some knowledge of the extension or distribution of old land orPalaeozoic surfaces, so as t
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