XXX 
SYSTEMATIC INDEX. 
ICHTHYODORULITES (continued). 
Pape 
Stichacanthus.133 
-ccemansi. 133 
-tortworthensis.131 
Oracanthus.135 
—-—- milleri.135 
-* pustulosus.133 
-pnigcus.133 
Gyracanthus . .139 
•-formosus.110 
Aganacanthus.115 
Erism acanthus ......... 110 
-jonesi.110 
-maior.147 
Lis tracan thus.148 
Byssacanthus.119 
--crcnulatus.149 
Edestus.151 
-heinrichsi.152 
-minor ..153 
-davisi.153 
Cynopodius .......... 151 
-crenulatus. 151 
Euctenius.155 
-unilateralis.155 
Family CCELOLEPI1LE.157 
Ccclolcpis . . . 153 
Thelodus. 153 
-parvidens.158 
Subclass 0STRAC0DERMI. .... Eo9 
Order HETEllOSTKACI .159 
Family riERASPILLE.159 
Pteraspis.100 
