GEKBEAL INDEX. 



851 



the North-Irish system of glacia- 



tion, 831. 

 Marine fossils, occurrence of, in the 



Coal-measures of Fife, 747. 

 Marr, Mr. J. E., and Prof. H. A. Nichol- 

 son on the Stockdale Shales, 654. 

 Mealy Gill, section in, 689. 

 Medlicott, Mr. H. B., Award of the 



Wollaston Gold Medal to, Proc. 32. 

 Megalosaurus, 59. 

 Meirings Poort, section in, 257. 

 Melin Ddrydwy, section on west side 



of stream at, 491. 

 Melkote area, 637 ; plan of the, 637 ; 



section of the, 638 ; rocks of the, 



637, 649. 

 Men Hyr, gneissose rock from, 314. 

 Men Par, gneissose rock of, 317. 

 Mersey, Dee, and E-ibble, denudation 



of the Low-level Marine Boulder- 

 clay of the, 291. 

 Mesozoic deposits, early, of the Orange 



Free State, two new Lepidotoid 



G-anoids from the, 138. 

 rocks, deficiency of, in Eastern 



Canada, 815. 

 Metamorphism of Cambrian strata in 



the North-west Highlands, 431 ; of, 



Silurian strata, 433. 

 of the Igneous rocks intrusive in 



the Cambrian and Silurian strata 



of the North-west Highlands, 434. 

 produced by intrusive rocks in 



the Cambrian and Silurian strata of 



the North-west Highlands, 410. 

 Mica, development of flakes of, in 



felspar crystals, 36. 

 Micaceous layers, overfolding of, along 



thrust-planes in Archaean gneiss, 



397. 

 Mica-schists of Eastern Anglesey, 



505. 

 of the Melkote area, 638, 639, 



640, 641, 649. 

 Microcline-mica, conversion of, into 



mica-schists, 393. 

 dyke in Archaean gneiss at Loch 



Glendhu, 390. 

 Middle Barton, or Barton Clay, 588 ; 



fauna of the, 589. 

 Chalk in Lincolnshire and York- 

 shire, 364 ; minute structure of the, 



357. 

 Limestones of Clifton, organisms 



from the, 188 ; insoluble residues 



from the, 191. 

 SkelgiU beds, 665, 672, 687, 



702. 

 Middlesborough, borings at and near, 



761, 763, 764, 765 ; boring oppo- 

 site, section of the, 779, 782. 



Middlesborough, discovery of Rock- 

 salt at, 761, 766. 



Minute structure of Cretaceous beds 

 in Lincolnshire and Yorkshire, 354. 



Mitcheldeania Beds, insoluble residues 

 from, 191. 



Moel Tryfaen, Pre-Cambrian quartz- 

 felsite of, 533. 



Moel Tryfaen and Llyn Padarn, Con- 

 glomerate &c. of, 281. 



Moffat area and Lake District, equi- 

 valence of Graptolitic zones in the, 

 706, 709. 



Moine thrust, 412, 414, 416, 418, 423, 

 425, 426, 428, 430, 434, 435, 436. 



thrust-plane, section across 



Ben Arkle to the, 415 ; succession 

 of strata above the, 436. 



Molteno, section through, 270. 



Beds, 246 ; coals of the, 248. 



Monckton, Mr. H. W., Mr. J. S. 

 Gardner, and Mr. H. Keeping on 

 the Upper Eocene, comprising the 

 Barton and Upper Bagshot forma- 

 tions, 578. 



Monian system of rocks, Prof. Blake 

 on the, 463. 



system, arrangement of groups 



in the, 536 ; table of distribution of 

 the rocks of the, 539 ; subdivisions 

 of the, 541 ; development of, in 

 other areas, Longmynd, St. David's, 

 Wrekin, 542. 



MonograpUis argenteus, zone of, 669, 

 672, 690. 



Clingani, band of, 673, 674, 682, 



684, 695, 698. 



, band of, in SkelgiU Beds 



and Birkhill Shales, 708. 



convoluttis, zone of, 671, 672, 



680, 684, 688, 695, 702. 



crisptis, zone of, 677, 678, 685, 



687, 690, 692, 693, 699, 705 ; zone 

 of, in the Gala Group, 709. 



fimhriatus, zone of, 667, 672, 680, 



685, 686, 689, 695, 699, 702. 

 , argenteus, and convohitus, 



zones of, in the SkelgiU Beds, re- 

 presented by the zone of M. gre- 

 garius in the Birkhill Shales, 707. 



gregarius, zone of, in Birkhill 



Shales, represented by the zones of 

 M. fimhriatus, argenteus, and con- 

 volutus in the SkelgiU Beds, 707. 



— spinigerus, zone of, 673, 674, 



682, 685, 686, 689, 690, 691, 695, 

 698, 702 ; zone of, in SkelgUl Beds 

 and BirkhiU Shales, 708. 



turriculatus, zone of, 676, 678, 



690, 692, 699, 704, 705; zone of, 

 in the Gala Group, 709. 



