Xll 



CONTENTS 



ANIMALS {Continued) : 

 Class C, Crinoidea 



General survey of class . 



Type of class, Pentacrinus 



Fossil example 

 Class D, Asteroidea 



General survey of class . 



Fossil example 

 Class E, Ophiuroidea . 



General survey of class 

 Class F, Echinoidea 



General survey of class . 



Type of class, St7vngylocentrotus 



Fossil example 

 Class G, Holothurioidea 



General survey of class 



Phylum IX, Molluscoidea 



General survey and classification . 

 Class A, Bryozoa ..... 



Type of class, Bugula aviculana . 



General survey of class . 



Fossil and living examples 

 Class B, Phoronida .... 

 Class C, Brachiopoda .... 



Type of class, Terebratiilina septentj'ionalii 



General survey of class 



Fossil and living examples 



Phylum X, Mollusc 



General survey and classification . 

 Class A, Amphineura .... 

 Class B, Pelecypoda .... 



Type of class, Ventis mercenaria 



General survey of class . 



Fossil and living examples . 

 Class C, Gastropoda .... 



Type of class, Busycon canaliciilatus 



General survey of class . 



Fossil and living examples . 

 Class D, Scaphopoda .... 



