SYSTEMATIC INDEX. 
XXXI 
Family PTERASPID2E ( continued). 
Page 
Pteraspis rostratu. 199 
-crouchi.XS 7 
Palaeaspis. 169 
-sericca.. 
— americana . . 
Cyathaspis . . . 
-- bauksi . 
*—— macculloughi . 
170 
170 
170 
Order 
OSTEOSTRACI 
176 
Family CEPHALA SPIDEE.176 
Cephalaspis. ]77 
-lyelli.179 
——— sahveyi.] 31 
-powriei.132 
- pagei. 133 
-- murchisoni.185 
-lightbodii.190 
campbelltonensis. 190 
dawsoni . 199 
laticeps ..192 
Eukcraspis. 193 
-pustulifera. 193 
Anchor] aspis.I95 
--- salted ..196 
-egertoni.196 
verrucosa.193 
Didymaspis.199 
■-griudroui. 199 
Family TREM ATASPI D/E.201 
Tremataspis. 201 
-schrenki.202 
