240 



RANGE OF GENERA IN TIME. 



RANGE OF GENERA IN TIME. 



G-enera, arranged in their 

 Order of Api^earance. 



Litiiites, Raphistoma, Obolus, . . . 



Camaroceras, Atrypa, Pterinea, . 



Gomphoceras^ Bellerophon, Penta- 

 merus, 



Orthis, Conularia, Murchisonia, 



Spirifera, Athyris, Posidonom^^a, 



Isoarca, 



Conocardium, Megalodon, Chon- 

 etes, 



Cardiomorpha, 



Or^thoceras^ Loxonema, Cyrtia, . 



Pieurotomaria,Porcellia, 



Productus, Macrochilus, Strepto 

 rhynchus, 



Goniatites, Pleurophorus, 



Edmondia, Myaliim, , 



Acteonina, 



Terebratula, Pinna, Cyprina, .... 



Lima, 



Gervillia, Myoconcha, . 



Ammonites, Naticella, Opis, 



Trigonia,Isocardia,Thecidium, . . 

 Cerithium, Plicatula, Cardita, . . . 

 Trochotoma, Tancredia, Gryphaea, 

 Ancylocer-as, Inoceramus, TJnicar- 



dium, 



Astarte, Pholadomya, Corbis, . . 

 Nerinsea, Goniomya, Exogyra, . 

 Terebratella, Limopsis, Nesera, 



Argiope, 



Baculites, Cinulia, Radiolites, . . . 

 Phj^sa, Paludina, IJnio, Cyrena, . . 

 Aporrhais, Tornatella, Pyrula, , . 

 Pectunculus, Thetis, Crassatella, . 

 Crenella, Chama, 



Yoluta,Conus,Mitra,Haliotis,etc. 



AtmHa, 



Helix, Auricula, Cyclostoma, . . , 

 Pseudoliva, Rosteliaria, Seraphs, 



Purpura, Strombus, 



Argonauta^ Tridacna, \ .,.,,.. , 



^ B 



o m 



,CS 1-5 H) o O 



S i4 &■ A P 



W S Ph 



