716 



GENERAL INDEX. 



Anglesey, Prof. T. G. Bonney on the 



microscopic structure of some rocks 



from, 232. 

 Anniversary Address of the President, 



Proc. 37. See also Etheridge, R., 



Esq. 



Annual Report for 1880, Proc. 8. 

 Anodontacanthus, Mr. J. W. Davis on, 

 427. 



Anodontacanthus acutus, 428. 



fastigiatus, 428. 



obtusus, 428. 



Anomodont reptile (Platypodosaurus 

 robustus), Prof. Owen on the skeleton 

 of an : Part II. Pelvis, 266. 



Antedon impressa, 135. 



Arabia Petrasa, sand from, 19. 



Areeosaurus gracilis, 700. 



Archaean geology of Anglesey, Mr. C. 

 Callaway on the, 210. 



Archcsopteris sp., 305. 



Ardennes, Upper Jurassic rocks of 

 the, 501. 



Arenig-felstone and Eskdale-granite 

 dispersions, junction of the, 361. 



Armancon, map of the valley of the, 

 531. 



Ascodictya and Stornatoporse. Mr. 



Vine on, 613. 

 Ascodictyon stellatum, 618. 



radians, 618. 



Ashdown Sands, constitution of, 16. 



Ashton, vein at, 77. 



Assynt and Durness, Mr. C. Callaway 



on the Limestone of, 239. 

 Asteropteris noveboraccnsis, 299, 307. 

 Astroconia Granti, Mr. W. J. Sollas 



on, a new Lyssakine Hexactinellid 



from the Silurian formation of 



Canada, 254. 

 Athabasca river, British Columbia, 



276. 



Aube, Upper Jurassic rocks of the, 

 525 ; map of the valley of the, 526. 



Augill, near Brough, Sandstone from, 

 12. 



Aust, near Bristol, Mr. J. W. Davis 

 on the Fish-remains of the Bone- 

 bed at, 414. 



Australia, Devonian plant from, 306. 



Auxerre, map of the Yonne valley 

 south of, 534. 



Avon, view of the gorge of the, near 

 Clifton, 76; Conglomerates of the 

 gorge of the, 76. 



Bagilt, Flintshire, Glacial sands from, 

 19. 



Balanoptera Juddi, 709. 

 Barmouth, Cambrian Grits of, 7, 25. 

 Barrah Hill, Section through, 194. 



Barrois, Dr. C, Award of the Bigsby 

 Medal to, Proc. 32. 



Basalt or Andesite from Skomer Is- 

 land, 411. 



Bay de Chaleurs, Devonian plants 

 from, 307. 



Beddgelert and Snowdon, Mr. F. 

 Rutley on devitrified rocks from, 

 403. 



■ , devitrified spherulitic rock from, 



403. 



Benches in British Columbia, 274. 

 Bigsby Medal, Award of the, to Dr. 



C. Barrois, Proc. 32. 

 Blake, Rev. J. F., on the correlation 



of the Upper Jurassic rocks of 



England with those of the Continent, 



497. 



Bluen y ciel, section through, 159. 

 Boclafon Mountain, gneissic rocks of, 

 219. 



, quartz-schist from summit of, 



233. 



Bodorgan, section on the railway from 

 Ty Croes to, 217. 



, structure of igneous rock from 



a green shale near, 236. 



Bodwrog, structure of crystalline 

 limestone from near, 236. 



Bolonian of the Boulonnais and Eng- 

 land, 581. 



Bone-bed, Mr. J. W. Davis on the 

 fish-remains of the, at Aust, near 

 Bristol. 



Bonney, Prof. T. G., on a boulder of 



hornblende picrite near Pen-y- 



Carnisiog, Anglesey, 137. 

 , on the microscopic structure of 



some Anglesey rocks, 233. 

 , on the serpentine and associated 



rocks of Anglesey, with a note on 



the so-called serpentine of Porth- 



dinlleyn (Caernarvonshire), 40. 

 Bootle bore-hole,constitutionof Bunter 



sandstone from, 13. 

 Borth Saint, structure of quartz-schist 



from, 233. 

 Boulder of Hornblende Picrite near 



Pen-y-Carnisiog, Anglesey, Prof. T. 



G. Bonney on a, 137. 

 Boulder-clay of West Cumberland and 



North Lancashire, 29. 

 Boulder-drift, Mr. Hollingworth on a 



peat-bed interstratified with the, 



713. 



Boulders, position of, in the Moel- 

 Tryfan deposits, 354 ; position of, 

 in Frondeg gravel-pits, 360. 



Boulonnais, Upper Jurassic rocks 

 of the, 557 ; map of part of the, 

 559. 



