The marine Carboniferous of North-east Greenl. and its Bracliiopod Fauna. 531 



stone, which, of megascopic fossils contains only crinoid stem- 

 joints and a short species of Fusulina or, perhaps, Fusulinella, rather. 

 Under the microscope it proves to consist of very closely packed 

 fragments of fossils, with but little matrix, that which exists of the 

 latter, however, being calcite. This rock bears a great resemblance 

 to the dark limestone {N:o ÎA6) mentioned below, which, however, 

 lies considerably lower in the series of strata. 



All the specimens previously treated of are derived from the 

 low hill-tops west of the western river, and next follows a series of 

 specimens collected at the river and direct eastwards from it. From 

 the profile and the notes in the diary it can be concluded that 

 these last named specimens are derived from beds lying lower in 

 the series of strata than the mountain-tops in the west. 



"10. Nahe östlich von dem vorigen, an der Mündung eines Elfs 

 (Cannon) 10 m. also wohl das tiefste anstehende Gestein. Mit Foss. 

 (wenig), fast schwarz". 



This rock {K:o 138} is a dense dark-gray, somewhat bituminous 

 limestone, the larger fossil contents of which include fragments of 

 brachiopods and of some smaller Primitia-Uke ostracoda and, pro- 

 bably, Fusulinella. 



"11a, b. Darüber lagernd mehr grünliche, durch Verwitterung 

 auch rotgefärbte Kalk- oder Sandsteine (wechsellagernd mehrere Male 

 mit dem dunkeln Gestein, von dem wenigstens 2 dunkle Bänder in 

 dem Sandstein gesehen wurden; das dunkle Gestein bisweilen schie- 

 ferig). Reihenfolge wahrscheinlich unten 10, darüber 11 a, darüber 

 Hb, dann wieder Ha, Hb, Ha und ähnliche, mehr und mehr 

 gelblich rote Sandsteine (wie 6, 7, 8), bis zum Gipfel". 



The specimens belonging to this group {N:o 1(Щ are, firstly 

 (11 a), a gray-green sandy clay-shale or, possibly, a sandstone shale, 

 slightly calcareous, and irregularly bedded; secondly, (,11b), a very 

 impure gray-green limestone in which no fossils could be observed 

 megascopically, with the exception of some unimportant fragments 

 of coal-substance. The rock contains iron in a very high degree, 

 and is very similar to clay ironstone. 



On microscopic examination, it proved to be greatly different 

 to the other limestones occurring in these sections. The matrix 

 consists chiefly of particles of calcite, mostly of a crystalline nature, 

 but sometimes containing impurities, being then only slightly cryst- 

 alline in structure. There also occurs yellowish siderite in fairly 

 large quantities, usually rusty and weathered. Small angular grains 

 of quartz lie fairly evenly distributed throughout the whole mass. 

 Organic parts are exceedingly scarce, the only ones distinguish- 

 able being irregular shell-fragments of crystalline calcite, probably 



