132 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jail. 21, 



The analysis of one of the commonest specimens is — 



Moisture 1*0 



Carbonaceous matter 1 "0 



Alumina 10*2 



Silica 10-8 



Proto-carbonate of iron 27*5 



Carbonate of lime 45*0 



Carbonate of magnesia 3*8 



99-3 



From their containing iron and lime, they are partially used in 

 the blast furnaces at the iron-works ; they have been also used in 

 the manufacture of a cement ; and in the neighbourhood of the mines 

 they are employed to repair roads, for which purpose they are well 

 adapted. 



3. Notices of some Fossils found iti the Coal Formation of Nova 

 ScoTiA. By John William Dawson, Esq. 



Plate VIII. 



1. Ichnolites. — The coal-formation of Nova Scotia has already 

 yielded ichnolites of three species, specimens of which, all unfortu- 

 nately very imperfect, have been presented to the Geological Society 

 by Mr. Logan and the writer of the present paper*. Desiring to 

 add to the value of this discovery, I spent several days of last sum- 

 mer in a careful re-examination of the red sandstones at Tatma- 

 gouche, which had formerly afforded these fossils, and in exploring 

 some other localities in which beds of the same age appear. The 

 results of these examinations are, ^/irst, the discovery of a few ad- 

 ditional footmarks of one of the species of which specimens were 

 sent last winter to the Geological Society. These new specimens 

 are not however more distinctly marked than those formerly found 

 at the same place. Secondly, the discovery, in a bed of coarse red- 

 dish shale immediately overlying the bed containing ichnolites, of 

 some coprolitic bodies, probably of common origin with the foot- 

 steps. One of these coprolites, on analysis, was found to consist 

 chiefly of carbonate of lime and argillaceous matter, with a consider- 

 able proportion of phosphate of lime, and traces of chlorine and or- 

 ganic matter. The figure of a well-marked specimen is given in the 

 accompanying Plate, fig. 1. Thirdly, a confirmation of my previous 

 belief of the carboniferous date of these beds with footmarks, by 

 finding in them impressions of a species oi Neuropteris common in our 

 coal-formation, and fragments of Sternbergia and of a lycopodiaceous 

 plant found in carboniferous beds, in various other parts of this pro- 

 vince. Fourthly, having exposed larger surfaces of the sandstones 

 on the banks of the French river of Tatmagouche than I had pre- 

 viously seen, I was struck with the vast abundance and great distinct- 

 ness of the worm-tracks and casts of worm-holes, which cover the sur- 

 * Vide Quarterly Journal of Geol. Soc. vol. i. p. 326. 



