Mr. T. R. Jones on Beyrichise. 

 Table of the Beyrichi^. 



175 



' Simplices : — 



Beyrichia simplex , 



simplex, ?)«r. ? 



straugulata , 



strangulata, var. » 



straugulata, var. /3 



■ strangulata, var. y 



bicornis 



Corrugatae : — 



Beyrichia Barraudiana 



Ribeiriana , 



affinis 



Jugosse : — 



Beyrichia Bussacensis 

 complicata 



complicata, var. decorata 



^Simplices : — 



Beyrichia mundula 



seminulum 



Wilckensiana 



Wilckensiana, var. plicata 



Corrugatae : — 



Be)^richia siliqua 



Jugosae : — 



Beyrichia Salteriana 



lata 



Maccoyiana 



Dalmaniana 



tuberculata 



tuberculata, var. nuda 



tuberculata, uar.antiquata 



Kloedeni 



Kloedeni, var. autiquata 



Kloedeni, var. torosa .. 



Bucbiana , 



Lower 

 Silurian. 



* ? 



Upper 

 Silurian. 



References. 



Page 



\73 



173 



171 



172 



172 



172 



173 



170 

 169 

 170 



169 

 163 

 165 



90 & 174 



89 

 90 



90 



89 



88 



88 



86 



87 



87 



165 



167 



167 



86 



EXPLANATION OF PLATE VL 



Fig. 1. Beyrichia complicata, Salter (typical form): right valve. 



valve. 

 F^g. 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. Klofdeni, M'Coy : right valve. 

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

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



2. Left 



