28 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. 



Table III. — Cambrian Brachiopoda — Continued. 



[BULL. 87. 



Specie.s. 



Lower Middle 

 Cam- Cam- 



brian, briau. 



Ortlii.s ( ?) lenticularis "Walileuberg 



Ortbis ( ?) leuticuhiris atrypoides Mattbcw 



Ortbia ( ?) lenticularis lyncioides Mattbew 



Orthis ( ?) lenticularis stropbomenoide.s Mattbcw 



Ortbi.s { ?) rerunicbia N. H. Winebell 



Ortbis ( .') salemensis "Walcott 



Ortbis (?) sandbergiS.H. Winchell .. 



Ortbisina ( .-) jobannensis ilattbew 



Protorbyncba (?) antiquata (Billings) 



Protorb yncba ( ?) minor ( Walcott) 



Syntiopbiaaracbne (Billings) 



Syntropbia aretbusa ( Billings) 



Syntropbia ( ?) armanda (Billings) 



Syntropbia barabuensis (A. "Winebell) 



Syntropbia calcifera (Billings) 



Syntropbia primordialis ( Wbitfield) 



Trom.atobolus insignia Mattbew 



Number of Cambrian species, IIC. 



Number of species in eacb division 



Number of species common to tbe Lower and tlieotber divisions of (lie 



Cambrian 



Number of species common to tbe Middle and tbe otber divisions of 



tbe Cambrian ■ 



Number of species common to tbe Cambrian and Ordovician system, C. 

 Number of species passing from eacb division into tbe Ordovician 



Upper 

 Cam- 

 brian. 



51 

 1 

 1 

 C 



