GENERAL OBSERVATIONS. 



387 



'"erebratuia Farai'y, gen. Terebratula. . 



Stringocephalu?, Rensselaeria 



Other Terebratulids 



Crania Family, gen. Crania 



Bryozoans 



Acephals 



LaMELLTBRaNCHS 



Monomyaries 



Dimyaries without a siphon 



Dimyaries having a siphon 



Cephalates 



Pteropods 



Gasteropods 



Shei2 without a beak 



Shell beaked 



Cephalopods 



Nautilus tribe, including Orthoceras, etc 



Ammonite tribe, gen. Goniatites 



Ammonite Tribe, gen. Ammonites 



ARTICULATES. 



Worms 



Crustaceans 



Entomostraca>-s . 

 Ostracoids . . 

 Tri'obites . . . 



Paradoxides 

 Bathyurus . . 



Asaphus, Remopleurides 



Calymene, Am pyx, Tllaenus, Acidaspis, 

 and Ceraurus 



