Gkol. Mag. 1913. 



Plate XIII. 



tongue 



toe-spine 



ball of foot 



heel 



1. Obvp:rse. 



tongue 



toe-spine 



heel 



brachiole 



2. Reverse. 



1, 2, CothnrnocysHs Elizce. 3. Denclrocystis scotica. 

 Caradocian : Girvan, Ayrshire. 



