﻿Our Record of Canadiaii Earthquakes. 



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well marked a species, and so useful as an indicator of 

 the Lower Carboniferous in disturbed districts. 



Fig. 6, X 25. 



6. Cytlurc (Species), (Fig. 6.) Valves, apparently 

 representing two species, occur in the Horton shales, but 

 have not been identified as yet with any known species. 



11. —COAL FORMATION". 



Small bivalve Entomostraca are very abundant in some 

 carbonaceous shales and bituminous limestones at the 

 South Joggins, Chiganois River, East River of Pictou, 

 Glace Bay, Cape Breton, Sydney, C.B., Mabou, C.B., &c., 

 where they seem to have swarmed in the lagoons of the 

 coal swamps, as Cyprids do in some modern ponds, but 

 the species do not seem to be numerous. Those noticed 

 in the paper in question are the following : — 



Fig. 7, X 25. 



1. Carhonia fahulina, Jones & Kirkby (Fig. 7.) This is 

 one of the most abundant species at all the localities, and 

 sometimes covers the entire surfaces of layers of shale 



