TAYLER ON THE TIN-ORE AT EVIGTOK. 349 



outcrop of it the granite loses itself. It is highly probable that 

 the cryolite forms a bed between the gneiss and granite, but 

 partly enclosed in the gneiss. We have not yet, however, seen 

 the bottom of the cryolite in any of our workings. This tin 

 district differs from all others known, being associated with the 

 cryolite, whilst tantalite seems to have taken the place of wolfram, 

 which generally accompanies tin-ores. 



XLVII. — Catalogue of a Geological and Geographical 

 Collection of Minerals from the Arctic Regions, 

 from Cape Farewell to Baffin's Bay, Lat. 59" 14' N. 

 to 76° 32' N. By the late Sir Charles Gieseck6, 

 Professor of Mineralogy to the Royal Dublin Society. 



[Abstract : from the Journal of the Royal Dublin Society, vol. iii., 

 1861, pp. 198-215. See also above, pp. 327, &c.] 



The " 356 " Specimens, from " 219 " Localities, may be grouped 

 as follows : — 



I. The East Coast, for a few miles N. of Cape Farewell. Locali- 

 ties, Nos. 1-7. 



Bocks. — Granites (red and white), syenite, mica-schist, talc- 

 schist, hornblende-schist, basalt. 



Minerals. — Tourmaline, garnet, hemispherical mica, asbestos, 

 talc, allanite,* avanturine, and common quartz. 



II. The South Coast, the Islands of Staatenhuk, and the large 

 island off Cape Farewell. Localities, Nos. 8-37. 



Hocks. — Granites (chiefly fine-grained, grey, some red and 

 reddish, and at one place green), syenite and syenitic granite, 

 mica-slate, hornblende-slate, schistose weiss-stein, chlorite -slate, 

 basalt, greenstone, red jasper, hornstone, clay (along-shore). 



Minerals. — Green mica, garnet, quartz, greenish quartz, dark 

 blue quartz, with imbedded green garnets, in veins in granite ; 

 schorl and tourmaline, talcose mineral like triclasite, actinolite in 

 talc, hornblende, pyrites, arsenical pyrites, glassy-grey felspar, 

 indigolite, tinstone and zirkon (in coarse-grained syenite up 

 the Pysursoak-fjord), graphite (in granite), labrador -felspar, 

 moroxite (in reddish, coarse granite), fergusonite (in syenitic 

 granite), calc-spar (in granite). 



III. The West Coast. 



1. From Christian Sound and Islands {see above) to the Iga- 

 likko-fjord. Localities, Nos. 38-47. 



Rocks. — Granites (red and grey), mica-slate, chlorite-slate, 

 hornblende-rock, basalt. 



* See also " Experiments on Allanite, a new Mineral from Greenland," by 

 T. Thomson, M.D., &.c,, Trans. Roy. Soc. Edinb., vol. vi., pp. 371-386. 



