550 HAUGHTON, GEOLOGY OF PARRY ISLANDS, ETC. 



Ormoceras crebriseptum, Hall. J. R. D. S., iii. t. 1, f. 3. 



Maclurea arctica. J. R. D. S., iii. t. 3, f. 1, 2. Dolomite. 



Atrypa, sp. 



Syringopora geniculata. 



Clisiophyllum, sp. 



Orthis elegantula. 



Huronia vertebralis, Stokes. J. R. D. S., iii. t. 2, f. 1, 2. 



Dolomite. 

 Receptaculites Neptuni, Defrance. J. R. D. S. iii. t. 3, 

 f. 3. 

 Composition of the Dolomite full of Catenipora escharoides) 

 from the western side of King- William's Island : — 



Per cent. Atoms. 

 Argil, peroxide of iron and alumina - 5 * 40 

 Carbonate of lime - - - 62*91 106 



Carbonate of magnesia - - 41*67 94 



99-98 



Carbonate of lime : carbonate of magnesia : : 106 : 94 = 1 * 127 : 1. 



6. Note. — The Geology of the Parry Islands, &c. From 

 the Map and. descriptions given by the Rev. Prof. Dr. S. 

 Haughton. 



The eastern portion of North Devon consists of Crystalline 

 (granitic and other) rocks, corresponding with those round about 

 tVolstenholme Sound (from Cape York to Granville Bay), and 

 the Carey Isles, on the opposite coast of Baffin's Bay. The 

 western part of North Devon, and the Cornwallis, Griffiths, and 

 Loivther Islands further to the west, and, to the south, the 

 northern portion of Cockhuroi Land, North Somerset (excepting 

 some crystalline rocks on the coast of Peel Sound, with offstand- 

 iug islands), all Boothia, King- William^ s Land, and Prince-of- 

 Wales Land, are Silurian. Banks' {Baring) I^and, the northern 

 portion of Eglinton, Melville, and Bathurst Islands (approximately 

 marked off by 76° parallel), and all Byam-Martin I., are occupied 

 by the Carboniferous Sandstone, Xiimestone, Ironstone, and 

 Coal (" Ursa Stage," O. Heer) ; and these reach away to the N.E., 

 into the Victoria Archipelago and North Cornwall. The Car- 

 boniferous liimestone constitutes the eastern part, at least, of 

 Prince- Patrick Island (exclusive of a small Jurassic patch), the 

 northern third of Eglinton Island^ most part of the two northern 

 promontories of Melville Island, the three northern promontories 

 of Bathurst Island, and the north-eastern part of Grinnell Land 

 (about 77° N., 96° W.). 



Jurassic (lias) rocks occur in two localities: (1) at Point 

 Wilkie, on the Eastern coast of Prince- Patrick Island ; and (2) 

 between Grin7iell Land q^xm^ North Cornwall, at Exmouth Island, 

 77° 10' N., 96° W. Belcher's " Last of the Arctic Voyages," vol. i, 

 p. 106 ; ii. p. 391. 



