THE CARBONIFEROUS DISTRICT OF COLCHESTER AND HANTS. 281 



of Colchester and Hants at least, a more minute general subdivision. 

 I would still, however, group sections (a), (i), and (c), as the Lower 

 series, which I believe can be traced throughout Nova Scotia, and 

 sections [d) and [e) as the Upper series, which is also very generally- 

 distributed. To these I would add a third group (/), including the 

 Upper Carboniferous marine limestone of Wallace, with Procluctus 

 semireticulatus (?), a small and depauperated form, Aviculopecten sim- 

 plex, Terehratula sacculus, and Cardiomorpha, sp. Taking this view, 

 the following table will give the distribution of these sub-formations 

 as far as known to me : — 



Tabular View of the Subdivisions of the Carboniferous Limestone of 

 Nova Scotia [in descending order). 



