318 Canadian Record of Science,. 



I.— LOWER CARBONIFER( )( JS. 



The Lower Carhoniferous collections ])elon<x to the bods 

 holding plants and fish reniains which locally underlie or 

 replace the marine limestones, and which I have called 

 the Horton Series, from their ;,freat developnienl and good 

 exposure at Lower Horton and Horton lilufl", where they 

 were examined and recognized as the ecpiivalent of tlu; 

 lowest member of the Carboniferous in Scotland, by both 

 Lyell and Logan. In si»ecimciis collected in these beds 

 and the corresponding beds on the Strait of Canseau and 

 in Pictou, the following species have been recognized 

 by Prof. Jones. 





Pig. 1. Left Valve. Ifc. Valve edgewise, x 'Si. 



1. Lepcrditia Okeni, Munsier (Fig. 1) and its variety 

 L. Scotoburdiegalcnsis of Hibbert, a very widely distributed 

 species and characteristic of the Lower Carboniferous in 

 Russia, Bavaria and Scotland. In the latter it occurs 

 abundantly in the shale and limestone of Burdiehouse, 

 near Edinburgh, celebrated for fish remains ; and in which 

 I first saw this fossil in my student days in Edinburgh ; 

 before I had collected it in Nova Scotia. Prof. Jones 

 remarks : " It is of especial interest to meet with so old a 

 friend, so abundantly and with so robust a habit, for 

 we have not seen larger examples of it in Scotland, in 



