84 Cincinnati Society of Natural History. 



CLAS SI FI C ATI ON. 



ANIMAL KINGDOM: 

 SUB -KINGDOMS : I. VERTEBRATA ; 11. ANNULOSA 

 III. ANNULOIDA ; IV. MOLLUSCA ; V. MOLLUS- 

 COIDA ; VI. CCELENTERATA ; VII. PROTOZOA. 



ANNULOSA. 

 Class Crustacea ; Sub-Class Entomosteaca. 



I. Order Triloblta ; Genera Calynimene, Acidas2ns, Asaphus, Ce- 

 raurKS, Dalmanites, Proetus, Lichas, Triart/irus, Trmucleus. 



II. Order Phyllopoda ; Genus Beyrichia. 



III. Order Ostracoda ; Genera Leperditia, Cythere. 



Class Annelida. 



I. Order Errantia ; Genera Walcottia, Nereidavus.^ Eotrophonia^ 

 I'rotosGolex, S eolith us. 



II. Order Tubicola ; Genera ConchicoUtes, Serpulites^ Spirorbis, 

 Tentaculites. 



ANNULOIDA. 



Class ECHINODERMATA. 



I. Order Crinoidea ; Genera Glyptocrinus, Heterocrinus, Anomalo- 

 crinus, Poteriocrinus. 



II. Order Cystoidea ; Genera Lepocrinites., A gelacri7iites, Licheno- 

 crinus, Anomalocystites, Hemicystites., Clyclocystoides. 



III. Order Asteroidea ; Genera Palceaster, Pala'sferina, Steuaster. 



IV. Order Ophiuroidea ; Genus Protaster. 



MOLLUSCA. 



Class Cephalopoda ; Division Nautilid^. 

 I. Order Tetrabranchiata. 



Famil}' Orthoceratidoi ; Genera Orthoceras^ Endoceras. 

 Famil}' (iomphoceratidoe, ; Genus Gomplioceras. 

 Family Phragmoceratidoi ; Genus Phrafjnioceras. 

 Family Lituitidoi ; Genus Trocholites. 

 Family T'rochoceratidoi ; Genus Trochoceras. 

 Family Cyrtoceratida' ; Genus Cyrtoceras. 



