Crinoid 



(Masti- 

 gocrinus) 



Brittle-star 



(Lapwor- 

 thura 



Corals 



(Zaphren- 



tis) 



(Favosites, 



in centre 



Nautiloid 



{O. annula- 



tum) 



Sea- 

 scorpion 

 (Euryp- 

 teras) 



Crinoid 

 (Perie- 

 chocrinus) 



Cystid (in 



centre) 



{Lepido- 



crinus) 



Dalmanites 



i'('fm I 



Lampshells 



■Penta- 



merus) 



Trilobites 



(in centre) 



(Sphae- 



rexochus) 



(Phacops) 



'-LiceT^wV^^ 



SILURIAN MARINE LIFE 



Lepidaster 

 [To face page 34 



