GENEKAL INDEX. 



Kirmneridge clay, Lower, near Horn- 

 castle, 205; near Market Easen, 

 206, 207, 208; near Brigg, 206; 

 near Wrawly, 206, 209 ; at Holton- 

 Moor station, 208; at Baumber, 

 208; at Langton, 208; at Hawk- 

 stead Hall, 209 ; at Woodhall Spa, 

 209 ; at Swindon, 211 ; at Hartwell, 

 211; near Wootton Bassett, 212; 

 at Eingstead Bay, 212 ; near Wey- 

 mouth, 212. 



Kimmeridge clay, Upper, at Kim- 

 meridge, 197; at Eingstead Bay, 

 200 ; at Ely, 201 ; in Lincolnshire, 

 201 ; near Fulletby,201 ; at Goulsby, 

 201 ; at Acre House, 203 ; at Net- 

 tleton Hill, 203 ; in Filey Bay, 203. 



King, C. Cooper, Esq., and Prof. T. 

 Eupert Jones, on some newly ex- 

 posed sections of the " Woolwich 

 and Eeacling beds" at Eeading, 

 Berks, 451. 



Krefft, Gerard, Esq., on the working 

 of the molar teeth of the Diproto- 

 dons, 317. 



Labyrinthodont, Mr. J. M. Wilson on 

 a, from the Coal-measures, lxxxi. 



Lake-basins in the southern part of 

 the lake-district, 157. 



of Cumberland and Westmore- 

 land, Mr. J. C. Ward on the glacial 

 origin of the, 152. 



Lake- district, contour-maps of the 

 southern part of the, showing the 

 form of the land at various stages 

 of submergence, 155, 156, 157 ; 

 granitic centres of the, 569 ; sketch 

 map of part of, showing the posi- 

 tions of the granitic rocks, 592. 



, Mr. J. C. Ward on the glacia- 



tion of the southern part of the, 

 152. 



, Mr. J. C. Ward on the granitic, 



granitoid, and associated metamor- 

 phic rocks of the, 568. 



Lake of the Woods, 607. 



Lakes, influence of geological structure 

 on the origin of, 163. 



Langdale, ice-scratches in, 153. 



Langdale Old Lake, origin of the lake- 

 basin of, 161. 



Langton, Lower Kimmeridge at, 208. 



Langton near Swanage, Prof. Seeley 

 on an Ornithosaurian (Dorato- 

 rhynchus validus) from the Purbeck 

 Limestone of, 465. 



Lapworth, C, Esq., and J. Hopkinson, 

 Esq., descriptions of the Graptolites 

 of the Arenig and Llandeilo rocks of 

 St. David's, 631. 



Latterbarrow, microscopic structure of 



trap of, 408. 

 Laurentian axis of Central North Ame- 

 rica, 607. 

 Lavas, microscopic rock-structure of 

 modern, 392 ; of Cumberland, clas- 

 sification of, 415. 

 Lavas and ashes of Cumberland, mi- 

 croscopic structure of the, 405 ; of 

 Wales, microscopic structure of 

 the, 399. 

 Leda lineata, 228. 

 Leucite, striated structure of, 395. 

 Leucite crystals, containing microlites, 

 glass- and stone-cavities, and mag- 

 netite grains, 395. 

 Leucitic basalt, from Torre dell' An- 

 nunziata, microscopic structure of, 

 393 ; from Torre del Greco, micro- 

 scopic structure of, 397 ; from Al- 

 bano, microscopic structure of, 398. 

 Lias, Mr. J. M. Wilson on the pro- 

 bable existence of a considerable 

 fault in the, near Rugby, and of a 

 new outlier of the oolite, 355. 



, Mr. E. Tate on the, about Ead- 



stock, 493. 

 Lias of North-west Lincolnshire, fos- 

 sils from the, 123. 

 Lima cedilignensis, 230. 

 Lincolnshire, North-west, Mr. Cross 

 on the geology of, 115 ; sketch map 

 of, 115; section from the chalk- 

 wolds of, to the river Trent, 116 ; 

 vertical section of the Jurassic beds 

 of, 117. 



, sketch map of part of, showing 



the position of the various clay -pits 

 in the Kimmeridge Clay, 202. 



, Upper Eimmeridge in, 201. 



Lingmell Beck, analysis of altered trap 



from, 597, 598. 

 Li quid- cavities in quartz, mode of 



microscopic examination of, 571. 

 Littorina ? crebricostata, 292. 

 Liversidge, A., Esq., on the Bingera 

 diamond-field, with notes on the 

 Mudgee diamond-field, 489. 

 Llanberis route, Snowdon, microscopic 



structure of felstone of, 401, 402. 

 Llandeilo and Arenig rocks of St. 

 David's, Messrs. Hopkinson and 

 Lapworth on the Graptolites of the, 

 631. 

 Llandeilo group, Pembrokeshire, fos- 

 sils from the, 179. 

 Llandeilo rocks of the vicinity of St. 

 David's, Pembrokeshire, Mr. H. 

 Hicks on the, 167. 

 Llangynog, N. Wales, section of strata 

 at Cwmgwynen phosphate mine, 



