1 4 Mr. Konig 07i the Rock Specimens 



recent formations which are known to proceed from the piinii- 

 tive mountains of Scandinavia, and other explored tracts of 

 high northern latitudes. Among them a variety of limestone 

 seems to prevail, which is very like the Alpine or mountain 

 limestone. It is compact, of yellowish and greyish colour, and 

 contains, among other remains of zoophytes and shells, abun- 

 dance of the same species of Terebratula, which are charac- 

 teristic of that rock in various alpine tracts in Europe, A 

 greyish-brown fetid variety of limestone, from the north side of 

 Barrow's Strait, bears great resemblance to the mountain lime- 

 stone as it occurs in Derbyshire ; it contains parts of coral- 

 lines, which are, however, too imperfect to be determined. 

 The chert, or hornstone, of which likewise specimens were 

 found in those parts, may, perhaps, occur as subordinate beds 

 in this transition limestone. Among the specimens from Riley 

 Bay, is a fragment of white granular marble passing into com- 

 pact. 



Not less indicative of the formation to which the above- 

 mentioned varieties of limestone belong is a calcareous mass, 

 which, it would seem, abounds in various parts of the north 

 coast of Barrow's Strait, on the eastern coast of Prince Regent's 

 Inlet, and which a^so occurs on the south coast of North Georgia. 

 This limestone, which bears some resemblance to that of Goth- 

 land, in which parts of the stems of Encrini are found, is yet 

 sufficiently distinct from this, and all other varieties I am 

 acquainted with, to deserve being briefly noticed in this place. 



It is of a yellowish-white colour, and, in most hand specimens, 

 exhibits a uniform coarse-granular structure ; it is friable, and 

 the grains are indeterminately angular, more or less shining, 

 and sometimes intermixed with, or cemented by, calcareous 

 matter of a deeper yellow. Reduced to powder, it emits a 

 yellow phosphorescent light when strewed on a heated iron. 

 This calcareous rock, in some specimens from Prince Regent's 

 Inlet, abounds with parts of the jointed stem and single joints 

 of a zoophyte belonging to the natural order of Encrini ; other 

 specimens appear to be entirely without these bodies : but on 

 subjecting the different varieties of aggregation to a closer 



