88 MICROSCOPICAL OBJECTS FOUND 



Bowmanii, is unquestionably a Foraminifer, almost 

 identical in its internal structure and the arrange- 

 ment of its cells, with the Fusulina of the Russian 

 limestones, confirming the discoveries of Messrs. 

 Tennant and Darker of the existence of micros- 

 copic shells amongst the Carboniferous de- 

 posits.* Dr. Dale Owen met with well charac- 

 terised Polythalamia in the oolitic portions of 

 the Carboniferous (Penthremite) limestone of 

 Indiana.f Mr. Phillips states that they occur in 

 the Palaeozoic limestones of Carrington Park and 

 South Devon, I and Sir R. Murchison has recorded 

 the existence of limestones belonging to the 

 uppermost members of the Carboniferous series, 

 which through a vertical extent of at least two 

 hundred feet, are charged with Fusulinse, — 

 Foraminifera allied to Alveolina. In one part 

 of the deposit are bands of pure white Fusulina 

 limestone, varying in thickness from fifteen 

 inches to five feet.§ Many of the above Pa- 

 laeozoic rocks have likewise obtained some calca- 



* Dr. Buckland ut supra, p. 44. 



f Silliman's American Journal. Vol. xlvi. No. 2, p. 311. 



X Phillips' Palaeozoic Fossils, p. 153. 



§ Murchison's Geol. of Russia in Europe. Vol. I. p. 86-7- 



