190 



Cincinnati Society of Natural History. 



Subkingdom ECIIINODERMATA : Star-fishes, Sea-urchins, etc. 



Class Holothuroidea '. Sea-cucumbers. 



Class Echinoidea: Sea-ttrchins. 



Class Asteroidea: Star fishes. 



Class Crinoidea: Crinoids. 



The members of this subkingdom are exclusively marine. Fossil 

 representatives of the last three classes are to be found in our rocks. 



Subkingdom CCELENTER ATA : Corals, Jelly-fishes, etc. 



Class Ctenophora: Soft-bodied Polyps. 

 Not represented. 



Class Anthozoa: Corals. 

 Marine. Fossil forms only are represented here. 



Class Hydrozoa: Hydras, Jelly-fishes, etc. 



Microscopic. 



Species identified* 2 



Genera " 1 



Families " 1 



Orders " 1 



fSubkingdom PROTOZOA: Primitive Animals. 

 Class Spongida: Sponges. 



Microscopic. 



Species identified ' 1 



Genera " 1 



Families " 1 



Orders " 1 



Class Infusoria : Ciliated Protozoans. 



Microscopic. 



Species identified.. 10 



Genera " 7 



Families " .. 8 



Class Rhizopoda : Root-footed Protozoans. 



Microscopic 



Species identified 4 



Genera " 2 



Families " 3 



Order " 1 



*By Dr. J. H. Hunt. 



tWe are indebted to Dr. J. H. Hunt for our synopsis of this subkingdom, the repre- 

 sentatives of which are chiefly microscopic 



