Murchisoris Silurian System. 



Leptaena depressa, 



— « tenuistriata, 



Littorina striatella, 

 Lituites cornuarctis, 

 Nautilus nodosus, 

 Nucula(?) laevis, 

 Orbicula granulata, 

 Orthis grandis, 

 — — ~— expansa, 

 — — alternata, 



— compressa, 



— — — protensa, 

 — ...... — anomala, 



pecten, 



— — — semecircularis, 



flabellulum, 



— virgata, 



radians, 



costata, 



actoneae, 



— callactis, 



lata, 



triangularis, 



canal is, 



testudinaria, 



bilobata, 



vespertilio, 



Pentamerus laevis, 



oblongus, 



Pleurotomaria angulata, 



Spirifer radiatus, 



plicatus, 



alatus, 



liratus, 



laevis, 



