216 NOVA SCOTIAN GEOLOGY.—HONEYMAN. 
coincidence of the N. 8. Carboniferous faunas with that of the 
mountain limestone of G. B. 
We have thus examined the marine fauna of the formations of 
Pictou County, and found an interesting and beautiful succession 
of life, with only one serious break, from, the Mayhill Sandstone, 
Intermediate Silurian—of Salter, to the Middle Carboniferous— 
Coal measures, 1. e. 
Beginning with Upper Arisaig A. Mayhill Sandstone, or the 
possible equivalent of the Medina Sandstone, U.S., we have pro- 
ceeded upwards through B Arisaig, where equivalence (British or 
American) is doubtful; then B’ Arisaig (which is considered by 
Hall as of Clinton Age, U. 8.) next we have passed through the 
C. Arisaig Aymestry Limestone, (according to Salter) Upper 
Silurian ; then the Upper Ludlow (Salter) or the Lower Helder- 
berg and “Upper Arisaig” of Acadian Geology. We have 
bridged the Devonian Gap succeeding, and passed through the 
Lower Carboniferous into the Middle. 
