TIIK r.MMioNIKKIM'l 



249 



ConocariUnni, Myalina, Schizodus* Leptodomus (Protoschizodus), 

 Edmondia, Cardiomorpha, Pleurophorus, Cypricardiella,* and San- 



Gastropoda. Most of the Devonian genera continue, and 

 the commoner are: Metoptoma, Pleurotomaria, Murchisonia, Bellero- 

 phon, Euomphalus, Straparollus, Naticopsis, Capulus, Loxonema, 



Fig. 84. OROUP OF CARBONIFEROUS FO8SII.S (AVONIAX). 



a. Orthis resu]>inata. 



/'. Avicnlopecten papyraceus. 



c. Cardiomorpha oblonga. 



d. Conocardium hibernicuni. 

 c. Kitoinplialus pentagonalis. 

 /. Bellerophon tangentialis. 



Macrochilus, and Turbonitella, but very few of these survivr tin- 

 close of the Carboniferous period. 



Cephalopoda. The following are some of the genera which 

 occur : of Nautiloidea there are Orthoceras, Actinoceras, Cyrtoceras, 

 Poterioceras, Temnocheilus,* Ccelonautihis,* Vestinautilus,* Strobo- 

 ceras,* Discites ; of Ammonidea the following genera belonging 

 to the Goniatitidie, Brancoceras, Pericyclus,* Gastrioceras, Glyph iv- 

 ceras, Nomitmoceras,* Dimorphoceras,* Prolecanites* Pronorites* 



