THE BRACHIOPODA. 



5 



In drawing up this catalogue of Brachiopoda I have received 

 the greatest possible assistance from Mr. T. Davidson, who has 

 most kindly helped me in the identification of several species, 

 and has also sent me many typical specimens for comparison. 

 I most gratefully acknowledge this assistance, and also the help 

 I have received from Mr. E. Cleminshaw, Mr. J. F. Walker, Mr. 

 D. Stephens, and others. I have also had the advantage of my 

 father's collection of Gloucestershire specimens for comparison. 



The following tables will shew the localities at which the 

 Brachiopoda occur in this district, and also the zones, and for 

 comparison tables taken from the writings of various other 

 authors. 



Localities at which the following Brachiopoda occur : 



