THE CARBONIFEROUS FORAMINIFERA OF THE 

 CLYDE DRAINAGE AREA. 



BY (THE LATE) JOHN YOUNG, LL.D., F.G.S. 



THE Carboniferous Foraminifera of the West of Scotland are found in nearly 

 a4l the fossiliferous Marine Limestones and their, accompany ing shales, 

 though certain forms are often restricted to particular horizons and localities. 

 During the earliest years of- research specimens were almost entirely obtained 

 from the weathered and rotted limestones and shales, which, on being care- 

 fully washed and examined, yielded a considerable number of species, but 

 more recently, through the use of transparent sections ground down from the 

 harder strata, many interesting species have been added to the lists. 



When the late Dr. H. B. Brady beo-an his well-known Monograph on "The 



i/ OX 



British Carboniferous Foraminif era," issued by the Palaeontographical Society 

 in 1876, nearly all the genera and species of foraminifera submitted for his 

 determination were sent as single specimens detached from the rock-matrix, 

 and he had to section many of them to transparency, often with consider- 

 able difficulty, in order to obtain a knowledge of their shell-walls and internal 

 structure. Had the same work now to be gone through Dr. Brady would 

 have been spared much labour by the aid of the many microscopic sections 

 which would have been at his disposal. 



Further particulars of the West of Scotland foraminifera will be found 

 in a paper by the late Dr. Young, which he read before the Geological 

 Society of Glasgow in 1891. 1 



The divisions' of the Carboniferous rocks which yield the foraminifera are 

 indicated in the following list by heavy letters U. L. S., Upper Limestone 

 Series ; L. IT. S., Lower Limestone Series. 



Lituola Bennieana, Brady. U.L.S. Linn, Dairy. 



Saccammina Carter!, Brady. L.L.S. Braid wood, Carluke, Campsie, Beith, 



(Main Limestone). 



Climacammina antiqua, Brady. L.L.S. Muirkirk. 

 Trochammina incerta (d'Orb.). L.L.S., U.L.S. Muirkirk, Eobroyston, 



Dairy. 



T. centrifuga, Brady. L.L.S., U.L.S. Muirkirk, Eobroyston, Dairy. 

 T. annularis, Brady. L.L.S. Capelrig, Kilbride. 

 T. gordialis, P. and J. L.L.S. South Shields, Kilbride, Dairy. 

 T. pusilla (Geinitz). L.L.S., U.L.S. Trearne, Beith, Gare, Carluke. 



1 "Notes on a small group of Carboniferous Foraminifera found in the Lower Lime- 

 stone Shales of the Muirkirk district in Ayrshire, with a list of the Genera and Species 

 found in the Coal-fields of Western Scotland." By John Young, F. G.S., V.P. Trans. 

 GeoL Soc. of Glasgow, vol. ix., part 2, 1893, p. 313. 



