﻿10G 



BRITISH DEVONIAN BRACHIOPODA. 



CONCLU SION. 



In this Monograph, some 91 so-called species and varieties have been described and 

 illustrated; but of these only about 65, or something less, have been with certainty 

 named ; 14 more are, in all probability, good species, but not yet sufficiently made out, on 

 account of the imperfection or insufficiency of the material in our present possession ; while 

 the remaining 12 have been indicated merely for the sake of reference, and will, no doubt, 

 when better known, have to be placed as synonyms of some of the 79 above recorded. 



The species about correctly identified will be the following : — 







Carb. 



Passage 



Upper 



Middle 



Lower 







Beds. 



Devonian. 



Devonian. 



Devonian. 



The divisions Lower, Middle, and 



Upper 





es and 

 Sand- 



o 



ether- 



>. 6 



Ph & 









Devonian are used here as terras of conveni- 





Shal 

 Cork 



pq 

 •a 



o 



Ph 



a CJ 



Hp 'Sb's 









ence, and not as equivalents to the 



Lower, 





oomhola Series or 

 Grits above Old 

 stone, County of 



o 

 is 



o 



5 -_S t« 

 S b -a 







o 



.ufuutc, unit Ljjfjcr vyiti ivcu. 





arboniferous. 



ilton and Mar 

 North Devon. 



andlake and S 

 win Beds. 



orquay, Woolb 

 mouth, and D; 

 Limestones an 



fracombe Serie 



inton Group. 



ooe Slates and 







u 



u 



Ph 



*l 



H 





h-1 



,-1 



Terebratula sacculus , 





X 



? 



X 





X 









— juvenis . . 













X 









— Newtoniensis . 













X 









Stringocephalus Burtini . 

 Athyris concentrica . 













X 



X 













X 



X 



X 



X 







— phalsena 













X 









Merista plebeia 













X 



X 







Ketzia ferita .... 













X 









Uncites gryphus 













X 









Spirifera Verneuilii vel disjuncta 







X 



X 



X 



X 



X 







— laevicosta vel ostiolata . 













X 





X 





— speciosa 













X 



? 







— sub-cuspidata 













X 









— undifera et var. undulata 













X 









— nuda .... 













X 



? 







— curvata 













X 



X 







— Urii .... 





X 





X 



X 



X 









— simplex 













X 









— cristata, var. octoplicata 





X 



X 



X 



1 



X 



X 





X 



Cyrtina heteroclita . 













X 



X 







— Demarlii 













X 









— ? amblygona . 













X 









Atrypa lens .... 













X 









— lepida .... 













X 









— reticularis 











X 



X 



X 





X 



— aspera 













X 



X 







— desquamata . 













X 









— flabellata 













X 









Davidsonia Verneuilii 













X 









Rhyncbonella triloba 













X 









