TRILOBITES. 95 



Class v.— Myzostomida.* 

 Class VI.— Annelida.* 

 Class VIL— Chsetouatha.* 



Subkingdom VI.— ARTHROPOD A. 

 Class I. — Crustacea. 



(1) CiRRIPEDIA.* 



(2) Rhizocephala.* 



(3) OSTRACODA. Leperditidne — Beyrichia. 



Cypridinidie.* 

 Polycopidte.* 

 Cytherollidse * 

 Cytheridfie — Cythere. 



Cypridse.* 



(4) copbpoda.* 



(5) Cladooera.* 



(6) Phyllopoda.* 



(7) Phyllooarida.* 



(8) Trilobita. HarpedidsB.* 



Remopleuridge.* 

 Olenidse.* 

 Conocephalidse.* 

 Bohemillidse.* 

 Calymenidai— Calymene. 

 Asaphidse — Asaphus. 

 Illfeoidae — Illcenus. 

 ^glinidse.* 

 Cheiruiidse.* 



Encrinuridse — Encrinurus. 

 Dindyminidse.* 

 Acidaspidse — Acidaspis. 

 Lichadse — Lichas. 

 Bronteidge.* 



