TRANSACTIONS OF SECTION C. 



877 



Zepidomelane (Haughton, 1850). 



Lettsomitc (British Musenm). 



Leuchtenbergite (Glen and Young, 187C). 



Leucoxene (Geikie, 1879). 



Limnite (Church, 1865). 



Linnaite (Terrill & Des Cloizeaux, 1880). 



Lislteardite (Maskelyne, 1878). 



Loganite (Harkness, 186G). 



LolUiigite (GoWms, 1871). 



Imdlamite (Field. 1877). 



Lussatite (Mallard, 1890). 



Lyellite (Maskelyne, 1864). 



Marmolite (Heddle, 1878). 



Martite (Heddle, 1882). 



Massicot? (Collins, 1871). 



Melanite (Teall, 1892). 



MicrocUne. 



Mirahilite (Glen and Young, 187G). 



Monazite (Miers, 1885). 



Montmorillonite (Collins, 1878). 



Mottramite (Roscoe, 1876). 



Mountain silk, &c. (Heddle, 1879). 



Necronite (Heddle, 1877). 



Neotype (Breithaupt, 1841). 



Nephelite (Allport, 1871). 



Nephrite (Heddle, 1878). 



Nosean (Allport, 1874). 



OJienite (Glen and Young, 1876). 



Oligoclase (Haughton, 1862). 



Omphacite (Teall, 1891). 



Orangite (Heddle, 1883). 



Ottrelite (Hatchings, 1889). 



Pargasite (Heddle, 1878). 



Penninitc (Heddle, 1878). 



Penwithite (Collins, 1878). 



Perthite (Heddle, 1883). 



Phlogopite ? (Heddle, 1878). 



Pickerinyite (British Museum). 



Picotite (Bonney, 1877). 



Picrolite (Heddle, 1878). 



Piedmontitv (Dana, 1892). 



Pihlite (Heddle, 1879). 



Pilolite (Heddle, 1879). 



Plumboaragonite (Collie, 1889). 



Phtmbogvmmite (Dana, 1850). 



Plumbonacrite (Heddle, 1889). 



Polybasite (Joy, 1860). 



Polytelite (Forbes, 1867). 



Prasilite (Thomson, 1840). 



Protolithionite (Sandberger, 1885). 



Proustite (British Museum). 



Pseudo-hypersthene, &c. (Heddle, 1878). 



Pseudophite (Heddle, 1879). 



Pyroaurite (Heddle, 1878). 



Pyrophyllite (Foster, 1876). 



Pyrosclerite (Heddle, 1879). 



Reichite (Breithaupt, 1805). 



Restormelite (Church, 1870). 



Rhabdopliane (Lettsom, 1878). 



RiehecUte (Harker, 1888). 



Rock silk, &c. (Heddle, 1879). 



Rubislite (Heddle, 1879). 



Sanidine. 



SoajJoUte (Ormerod, 1869). 



Schraufite 7 (Thomson, 1887). 



Schrotterite (Dana, 1868). 



Seiiarmontite (Davies, 1867). 



Sericite. 



Spangolite (Miers, 1893). 



Spessartite (Heddle, 1878). 



Sieplianite (Davies, 1866). 



Tallingite (Church, 1865). 



TavistocJdte (Church, 1865). 



TJw7-ite (Heddle, 1883). 



Tobermorite (Heddle, 1880). 



Totaigite (Heddle, 1878). 



Tridymite (Lasaulx, 1876). 



Twrgite (Heddle, 1882). 



Tyreeite (Heddle, 1881). 



Uigite (Heddle, 1856). 



Uralite. 



Valentinite (Hall, 1868). 



Vmiquelinite (Davies, 1877). 



Vermiculite (Parke, 1877). 



Voltzite (Dana, 1868). 



Walkerite (Heddle, 1880). 



AVaringtonite (Maskelyne, 1 864). 



Wicklowite (D'Achiardi, 1883). 



Willflviite (Glen and Young, 1876). 



Wittichcnite ? (Collins, 1871). 



Woodwardite (Church, 1866). 



Xantholite (Heddle, 1879). 



Xanthosidcrite (Haughton, 1866). 



Xonaltite (Heddle, 1882). 



Zeunerite (Weisbach, 1872). 



11. On the Age and Origin of the Granite of Dartmoor, and its Eelations 

 to the Adjoining Strata. By Alexander Somervail, 



The object of this paper is to furnish proof that the true age of the Dartmoor 

 granite, and most prohably of the bosses of Cornwall, is referable to an interval or 

 period of time between the Lower and Upper Culm or Carboniferous system. 



The author regards the proofs advanced hy De la Beche and others, up to this 

 interval, as decisive, but thinks there is no evidence to support the post-CJarboni- 

 ferous or Permian Age of the granite. 



In certain localities in the south of Devon there are conglomerates which 

 contain fragments of the Radiolarian cherts and other Lower Culm rocks. These 

 fragments conclusively prove that the Lower Culm had been elevated from a deep 

 sea, and worn down to supply materials for the formation of the conglomerates. 



