GENERAL OBSERVATIONS. 



401 



Terebratula Family, gen. Terebratula.... 



Stringocepbalus, Rensselaeria 



Other Terebratulids 



Crania Family, gen. Crania 



Calceola Family, gen. Caleeola 



Bryozoans 



Acephals 



COXCHIFERS 



Monomyaries 



Dimyaries without a Biphon 



► Dimyaries having a siphon 



Cephalates.... 



Pteropods 



Gasteropods 



Shell without a beak 



Shell beaked 



Cephalopods 



Nautilus tribe, including Orthoceras, etc. 

 Ammonite tribe, gen.Gouiatites 



ARTICULATES. 



Worms 



Crustaceans 



Entomostracans 



Ostracoids 



Trilobites 



Paradoxides, Conocephalus, Sao, 

 Ellipsocephalus, Hydrocepha- 

 lus, Dicellocephalus, Arionel- 

 lus, Menocephalus, Bathyurus 



Olenus and Agnostu: 

 Ogygia 



Trimicleus, Asaphus, Remopleu- 

 rides,Amphion,andTriartbrus 



Calymene, Ampyx, Illsenus, 

 27 Acida.spis, and Cheirurus \ 



