go THE HABITAT OF THE EURYPTERIDA 



Ceratiocarid: Ceratiocaris papilio 

 Synxiphosuran: Neolimulus falcata 

 Note: In same locality Pterygotus and Slimonia are found in abundance asso- 

 ciated with Beyrichia kloedeni and Ceratiocaris. 



Lanarkian Fauna of Scotland. 



Localities in Hagshaw Hills anticline 

 Glauconome layer in bed o 

 Eurypterid: Eurypterus dolichoschelus 

 Coelolepid fishes: Lasanius problematicus 



Ateleaspis tessellata 

 Bryozoan: Glauconome disticha 

 Sponge. 

 Worm tube: Spirorbis sp. 



DEVONIC 



Old Red Sandstone Fauna of Scotland. 



a. Pterygotus beds of Carmylie. 



Eurypterids: 



Pterygotus anglicus (cc) 

 Parka decipiens (eggs) 



b. Acanthodian beds of Turin Hill (Arbroath flags). 



Eurypterids: 



Eurypterus brewsteri 

 E. pygmaeus 

 Pterygotus anglicus 

 P. minor 



Stylonurus scoticus 

 S. ensiformis 

 S. powriei 



Fishes: 



Mesacanthus mitchelli 

 Ischnacanthus gracilis 

 Climatius scutiger 

 C. uncinatus 

 C. reticulatus 

 C. macnicoli 

 C. grandis 

 C. gracilis 

 Parexus recurvus 

 P. falcatus 



Euthacanthus mitchelli 

 E. elegans 

 E. curtus 

 Cephalaspis asper 

 C. lyelli 

 Thelodus pagei 



