



** Column elliptic. 



o Alimentary canal round. 

 Articulating surface of columnar joints 



transversely ridged, 

 f Auxiliary side arms round. 



J Auxiliary side arms placed irregular, 



1 The five scapula? smooth, having 



each four fingers. 



2 The five scapulae rugose, having each 



six Augers. 

 *** Column pentangular. 



o o o Alimentary canal pentangular. 



Articulating surface of columnar joints ra- 

 diated . 



t Auxiliary side arms round. 

 J Auxiliary side arms irregular. 



1 The five scapulas smooth 

 * * * Column not known. 



1 The five scapulae tuberculated. 



2 The five scapulae granulated. 



3 The five scapula? striated. 



1 Sp. 



2 Sp. rugosua. 



6 Sp. pentangularis, 



3 Sp. tuberculatus. 



4 Sp. granulatut. 



5 Sp. striatus. 



IV. DIVISION. COADUNATA. The joints of the pelvis 



anchylose to the first columnar joint. 

 A Pelvis formed of five joints. 



a Column enlarged at the summit, 

 o Alimentary canal round. 



IX. GEN. EUGENIACRINITES. 



1 Sp. guinqu angularis. 



