President's Address. 83 



Massing tlie wliolc iiiaviiic l)(3ds togeilior wo find tliat they 

 contain — 



Bracliiopoda, 11 genora, 18 species. 



Bivalves, 15 „ 33 



Gasteropoda, 11 „ 12 



Cephalopoda, 2 „ 4 „ 



The investigations carried out by Mr James Bennie and Mr 

 Henderson supplemented by those of other collectors have es- 

 tablished the occurrence of several marine bands in the Wardie 

 shales around Edinburgh. Although smaller in development 

 they are not of less importance ; one of the beds, that at Wood- 

 hall, showing the first appearance of the Pteropoda. An- 

 other marine deposit has been investigated by Mr Henderson, 

 viz., some shales overlying the greenstone of Craiglockhart 

 Hill, in which both Brachiopoda and Lamellibranchiata 

 appear. In addition to the two mentioned, three or four 

 others are known to exist around Edinburgh. A full descrip- 

 tion of them with their fossil contents, will be found in a 

 paper by myself, " On our Present Knowledge of the Inver- 

 tebrate Eauna of the Lower Carboniferous or Calciferous 

 Sandstone Series of the Edinburgh neighbourhood," etc.* 



A census of the L. Carboniferous fauna met with around 

 Edinburgh gives the following results : — 



Brachiopoda, 2 genera, 3 species. 



Bivalves, 9 „ 13 „ 



Gasteropoda, 4 „ 4 „ 



Pteropoda, 1 ,, 1 ,» 



Cephalopoda, 2 „ 5 „ 



Eleven out of the thirteen species of Bivalves are not 

 known to exist with any certainty above in the Carboni- 

 ferous Limestone ; such is the same with only one of the 

 Gasteropods, whilst all the Brachiopoda and Cephalopoda 

 pass upwards. The Lower and Upper Limestone Groups 

 contain the great mass of molluscan life, and as such need 

 not engage any great share of our attention. In one bed 

 alone — the Main Limestone of Dairy — according to INTr R. 



* Quart. Jour. Gcol. See, 1878, xxxiv., pp. 1-2G. 



