120 E. J. CHAPMAN ON TRILOBITES. 



Summary. 



Retrospective view of the Sub-Orders, Sections aud Families of the preceding classi- 

 fication. 



Ori>er TRII.OBITA. 



Sul)-Or(ler I.— I'USl IJJl-ORMKS. 

 Fain. 1, Agnostidffi. 



Sub-Ordor II.— LATIFORMES. 



§ 1. Lkvati. 



Fain. 2, Ill.ionidit!. 

 F\tm. 3, Asaphidte. 



§ 2. SUUATI. 



Fam. 4, Basilicidio. 

 Fum. 5, Dikeloiephalidti;. 



§ ?,. 1'ai,m.\ii. 



Fum. 6, Licliasidic. 

 Fum. 7, Bronteidic. 



§ 4 Col.l'MNATI. 



Fam. 8, Phaetouidic. 

 Fam. 9, Proetidtc. 



Sub-Order III.— CONIFKONTES. 



§ 1. LOXdlCX/NI. 



Fam. 10, HomalonotidiO. 

 Fum. 11, Calymenidpc. 

 Fam. 12, Triartbrida?. 



§ 2. Cl'kticoni. 



Fam. 13, Conooepbalidtc. 

 Fam. 14, Conocoryphidfc. 



§ 3. VlTTATI. 



Fam. 15 Olonidio. 

 Fum. 16, Aretluisinidio. 

 Fam. 17, Harpesidio. 



Sub-Order IV.— FKONTONES. 



§ 1. Annilati. 



Fam. 18, Pbacopsid;e 

 tarn. 19, Eiicriuuridtc. 

 Fam. 20, Cbeiruridaj. 



§ 2. AliMATI. 



Fam. 21, Acidaspidrc. 

 Fam. 22, Paradoxidse. 



§ 3. Globosi. 



Fam. 23, Trinucleidse. 

 Fam. 24, Ampyxidic. 

 Ihm. 25, ^glinidie. 



§ 4. OCULOSI. 



Fam. 26, Boliemillida?. 

 Fam. 27, Remopleurida?. 



