﻿PLATE XIX. 



1 . Rhynchonella reniformis, Sowerby. A large example from the Carboniferous limestone 



of Kildare in Ireland, with three ribs on the mesial 

 fold. 



2. — — In the collection of Mr. E. Wood, with four ribs on the 



mesial fold. 



3. 7. — — Different specimens from Millecent, in Ireland; fig. 4 



alone being from Castleton, in Derbyshire, and collection 

 of Dr. Bowerbank. 



8. — cordiformis, Sowerby. From the original example in the collection of 



Mr. J. de C. Sowerby. 



9, 10. — ? From the Carboniferous limestone of Kildare, in 



Ireland. 



H' \ r'l — angulata, Linnceus, sp. From the Carboniferous limestone of the 

 14, 15. j 



Isle of Man, in the collection of the Rev. 

 J. G. Cumming. 



12. — — From Yorkshire, in the collection of the School 



of Mines. 



16 — — From Settle, in Yorkshire, in the collection of 



Mr. Burrow. 



N.B. This series illustrates the variations in number of the ribs. 



