GENERAL OBSERVATIONS. 



387 



Terebratula Family, gen. Terebratula 

 Stringocephalus, Rensselaeria 



Other Terebratulids. .. . , 



Crania Family, gen. Crania 



Bryozoans 



Acephals 



IiAMELLIBRANCHS 



Monomyaries 



Dimyaries without a siphon 



Dimyaries having a siphon 



Cephalates 



Ptebopods 



Gasteropods 



Shell without a beak 



Shell beaked 



Cephalopoda 



Nautilus tribe, including Orthoeeras, etc 



Ammonite tribe, gen. Goniatites 



Ammonite Tribe, gen. Ammonites 



ARTICULATES. 



Worms 



Crustaceans 



Entomosteacans . 

 Ostracoids . . 



Trilobites . . . 



Paradoxides . 

 Bathyurus . . 



Asaphns, Remopleurides 

 Calymene, Ampyx, Illaenug, Acidaspis, 

 and Ceraurus 



