Mr. T. R. Jones on Beyrichise. 

 Table of the Beyrichi^. 





Lower 

 Silurian. 



' Simplices : — 



Be3Tichia simplex 



simplex, var.1 .... 



strangulata 



strangulata, var. a. 



strangulata, var. j3 



strangulata, xiar. y 



bicornis 



Corrugatae : — 



Beyrichia Barrandiana 



Ribeiriana 



affinis 



Jugosse : — 



Beyrichia Bussacensis 



compllicata 



complicata, var. decorata 



''Simplices : — 



Beyrichia mundula 



seminulum 



Wilckensiana 



Wilckensiana, var. plicata 



Corrugatse : — 



Beyrichia siliqua 



Jugosse : — 



Beyrichia Salteriana 



lata 



Maccoyiana 



Dalmaniana 



tuberculata 



tuberculata, var. nuda 



tuberculata, ?;ar.antiquata 



Klcedeni 



Klcedeni, var. antiquata 



Klcedeni, var. torosa ., 



Buchiana 



*? 



*? 



Upper 

 Silurian. 



References. 



Page 



173 



173 



171 



172 

 172 

 172 

 173 



170 

 169 

 170 



169 

 163 

 165 



iif 



V-S 



90 & 174 



89 

 90 



90 



89 



88 



88 



86 



87 



87 



165 



167 



167 



86 



EXPLANATION OF PLATE VL 



right valve. 2. licft 



Fig. 1. Beyrichia complicata, Salter (typical form) 



valve. 

 Fig. 3. B. complicata : right valve. 4. Left valve. 

 Fig. 5. B. complicata (young) : right valve. 

 Fig. 6. B. complicata, var. decorata, Jones : right valve 

 Fig. 7. B. Klcedeni, M'Coy : right valve. 

 Fig. 8. B. Klcedeni, var. antiquata, Jones : right valve. 

 Fig. 9. B. Klcedeni, M'Coy : right valve. 





