CAMBRIAN BRACHIOPODA. 



321 



CLASSIFICATION. 



That we may have a graphic illustration to aid in description, the following table and 

 scheme are inserted. The ordinal classification of Beecher [1891], with emendations, is taken 

 as the basis for the orders, while the arrangement of superfamilies is practically that of 

 Schuchert [1897], with such emendations and additions as greater information has rendered 

 necessary. 



Table of classification of Brachiopoda. 



Rustellidse Ruatella. 



Paterinidse. 



"Mickwitzia. 

 Micromitra. 



(Paterina). 



(Iphidella). 

 Volborthia. 

 .(?)Helmerseiiia. 



'urticiidae Curticia. 



Obolinse. 



Elkaniinae. 

 Neobolinse. 



Biciina; 



Obolus. 



(Broggeria). 



(Palaobolus). 



(Fordinia). 



(Lingulobolus). 



(Miokwitzella). 



(Acritis). 



(Schmidtia). 



(Westonia). 

 I-ingulella. 



(Leptembolon). 



(Liugulepis). 

 Delgadella. 



.Elkania. 



NeoboluB. 



Kutorginida; 



Schuchertinidse . 



/Bicia. 

 'iDicellomua. 



.Kutorgina. 

 . Schuchertina. 



Obolellidse. 



Siphoiiotretidae. 



Acrothelinas. 



Acrotretinse. 



Acrothele. 



(Redlichella). 

 Discinolepis. 



Linnarssonella. 

 Acrotreta. 

 Acrothyra. 

 Discinopsia. 



>Discinidse Orbiculoidea. 



>Craniid8e Philhedra. 



Nisusiinse. 



Billingsellinaj. 



Eoorthins. 



S c 



( o'S (•Rafinesquinae. 



fEoorthis. 

 ■\Finkelnburgia. 



. Eostrophomena. 



cB a cB a 



Syntrophiidse 



I(?)Swantoma. 

 Syntrophia. 

 Huenella. 

 Clarkella. 



62667°— VOL 51, pt 1—12- 



