﻿CONCLUSION. 



Ill 







is 





<5 1 





p 

 o 



y. 



o 



p 





Pt 



o 

 > 



> 

 a 







M 

 U. 



55 



H 

 Q 



P 



M 



n 





O 

 ca 



ri 



j 



Q 



id 



M 





Efi 



Ol 

 BK 



a 



E= 





■«; 

 O 



13 





o 

 ►J 



lcrebratula sacculus ...... 



X 



X 



X 





: 1 — clongata ...... 



X 



X 







Spirifera Urii ....... 



X 



X 



X 





■ — lineata ....... 



A 



X 



A 





i — laminosa ^accoruing to oaner^ . • 



A 



X 







— cristata, var, octoplicata , • . 



A 



X 



A 



A 



? — insculpta ...... 



X 





X 





Atrypa reticularis ...... 





X 



X 



X 



Rhynchonella pugnus ...... 



X 



X 



X 





- — acuminata ..... 



A 





v 



A 





IJlcUlOUUU ..... 



V 

 A 



A 









V 

 A 





■ X 





Camarophoria rhomboidea, vel globulina 



X 



X 



X 





Strophomena analoga ..... 



X 



X 



X 





Streptorhynchus umbraculum, vel crenistria . . 



X 



X 



X 



X 



Orthis striatula ....... 



? 



X 



X 





Clionetes sordida 









X 



— Hardrensis ...... 



X 



X 







Strophalosia productoides, vel caperata 





X 



X 





? Productus scabriculus ..... 



X 



X 







1 — longispinus ..... 



X 



X 







Discina nitida ....... 



X 



X 







Lingula squamiformis ..... 



X 



X 







But, as I have already stated, there must still prevail some uncertainty whether Sp. glabra, 

 Sp). ovalis, and Ort/iis rcsiqrinata, might not also be represented in the Devonian as well 

 as in the Carboniferous period. 



Before proceeding further with what we may have to say with reference to the 

 Devonian species of Devonshire, Cornwall, and West Somerset, let us give a glance at 

 those Brachiopoda that occur in slaty and sandy grits, which in some parts of the 

 South of Ireland lie over the upper part of the Old Red Sandstone. In the 

 county of Cork (according to the maps and sections made by the Geological Survey of 

 Ireland) we have underlying the Carboniferous Limestone an enormous development of 

 Carboniferous Slate, which is known to contain Carboniferous fossils only, such as 

 iSjjirif. cuspidata, Orthis Michelini, Street, crenistria, Athyris squamosa, Bit. pleurodon, 

 &c. (Salter). Under these occur another series of dark-coloured clay-slates, and brown, 

 rusty, sandy-looking rocks, which in hand-specimens, according to Mr. Jukes, is readily 

 mistaken for a brown, fine-grained sandstone. These last-named Irish beds constitute, 



1 This point of interrogation indicates that the question relative to either the specific identification 

 or recurrence will require further examination, for reasons already given. 



