CONTENTS. 



Pulvinites 

 Pacbymya 



Family III. — Pectinavea 



Pedum 



Lima - 



Limea 



Pecten 



Hinnites 



Spondylus 



Plicatula 



Sphsora 

 Family IV. — Ostracea 



Ostrea 



Gryphsea 



Exogyra 



Carolia - - 



Pododesmus - 



Placuna 



Placunanomia 



Anomia 



JEnigma 



CLASS V. — BR ACHIOPOD A - 

 Order I. — Ancylopoda - 

 Family I. — Terebratulidce 

 Terebratella - 

 Magas 

 Bouchardia 

 Terebratula - 

 Gryplius 

 Terebratulina - 

 Terebrirostra - 

 Fissurirostra - 



Family II. — Thecideadce 

 Megathyris 

 Tbccidium 



Order II. — Helictopoda 

 Family I. — Spiriferidce 

 Spirifer 

 Cyrtia 

 Atrypa 

 Athyris 



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