XXX 
SYSTEMATIC INDEX. 
ICHTHYODORULITES {continued). 
Page 
Stichacanthus.133 
-coemansi.133 
-tortworthensis.134 
Orac an thus.135 
-milleri.135 
-pustulosus.138 
-pnigeus. 138 
Gyracanthus . . 139 
-formosus.140 
Aganacanthus.145 
Erismacanthus.146 
-jonesi.146 
-major.147 
Lis tracan thus.148 
Byssacanthus.149 
-crenulatus.149 
Edestus. ...151 
-heinrichsi.152 
-minor.153 
-- davisi.153 
Cynopodius.154 
-crenulatus.154 
Euctenius.155 
-unilateralis.155 
Family CCELOLEPID^E.157 
Coelolepis ..158 
Thelodus.158 
-parvidens.158 
Subclass OSTRACODERMI.159 
Order HETEKOSTRACI .159 
Family PTERASPIDJE.159 
Pteraspis.160 
