﻿PLATE I. 

 Fig. Page 



1. 1 a. Lepracanfhus colei, Owen ; dorsal fin-spine, lateral 



aspect, and portion of ornament enlarged four times. — 



L. Coal-Measures ; Lowmoor. [P. 2233.] 115 



2. Acondylacanlhus colei, Davis ; transverse section of dorsal 



fin-spine. — L. Carboniferous Limestone ; Armagh. 



[39167.] 108 



3. Oracanthus (?) milleri, Ag. ; spine. — Ibid. [P. 3134.] 137 



4. Cynopodius crenulatus, Traq. ; spine. — Calciferous Sand- 



stone : Pitcorthy, Fife. [42085.] 154 



5. 6. Acanthodes pusillus, Ag. — L. Old Red Sandstone ; 



Tynet Burn. [35786, P. 1329.] 12 



7. Acanthodes mitcTielli, Eg. — L. Old Bed Sandstone ; Eorfar. 



[38594.] 13 



8. Ischnacanthus gracilis (Eg.). — Ibid. [P. 132.] 22 



9. Ganodus oweni, Ag. ; left palatine tooth, oral aspect. — 



Stonesfield Slate. [P. 3100 b.] 56 



10. Ganodus dentatus, Eg. ; left mandibular tooth, inner 



aspect, twice nat. size. — Ibid. [P. 614.] 57 



11 a, b. Ganodus rugulosus, Eg. ; right mandibular tooth, 



inner and outer aspects. — Ibid. [P. 5152.] 58 



12. Ganodus curvidens, Eg. ; right mandibular tooth, outer 



aspect.— Ibid. [P. 599.] 58 



13. Ganodus (?) bucklandi, Eg. ; right palatine tooth, oral 



aspect.— Ibid. [P. 3107.] 58 



14. Ischyodus colei (Ag.) ; left palatine tooth, oral aspect. — 



Ibid. [P. 480.] 60 



15 a-c. Chimcera pliocenica, sp. nov. ; right palatine tooth, 

 oral, superior, and inner aspects. — Pliocene ; Tuscany. 



[47032.] 91 



