386 



PALEOZOIC TIME. 



RADIATES. 

 Polyps 



Cyathophyllum Family 



Favosites, of the Madrepore Tribe 



Haly sites 



Oculina Tribe 

 Astrasa Tribe 



Acalephs 



Graptolites 

 Chaetetes 

 Echinoderms 

 Cystideans 

 Crinideans 



Blastideans (Pentremites, etc.) 

 Star-fishes 



Palaeechinoids (including Archseocidaris) 

 Cidaris, Spatangids, «tc 



MOLLUSKS. 

 Brachiopods 



LiDgula Family, gen. Lingulella 



Obolus, Obolella 

 Biscina Family, gen. Discina 



Siphonotreta 

 Orthis Family, gen. Orthis 



Leptaena 



Strophomena 

 Rhynchonella Family, gen. Rhynchonella, etc 



Pentamerus 



Oamarophoria 



Productus Family, gen. Chonetes 



Productus 



Spirifer Family, gen. Atrypa 



Spirifer 



Athyris 



