276 IOWA GEOLOGICAL SURVEY 



10. Climatius latispinosus (Whiteaves). Lower Devonian; 

 Campbellton, New Brunswick. 



11. Homacanthus gracilis Whiteaves. Lower Devonian; 

 Campbellton, New Brunswick. 



12. Machaer acanthus sulcatus Newberry. Lower Devonian; 

 Gaspe, Province of Quebec. Also at higher levels of the Gaspe 

 series. 



13. Gyr acanthus incurvus Traquair. Lower Devonian; 

 Campbellton, New Brunswick. 



ARTHRODIRES. 



14. Phlyctaenaspis acadica (Whiteaves). Lower Devonian; 

 Campbellton, New Brunswick. 



CROSSOPTERYGIANS. 



15. Dendrodus arisaigensis Whiteaves. Arisaig series (? 

 Helderbergian) ; Nova Scotia. 



2. SPECIES OF FOSSIL FISHES OCCURRING IN THE 

 MIDDLE DEVONIAN OF NORTH AMERICA. 



OSTRACODERMS. 



16. Shagreen granules of Thelodus, Ccelolepis, etc. Colum- 

 bus limestone (="Corniferous") ; Columbus, Ohio. 



ELASMOBRANCHS. 



17. Cladodus prototypus Eastman. Columbus limestone; 

 Columbus, Ohio. 



18. Cladodus monroei Eastman. Hamilton limestone; Mil- 

 waukee, Wisconsin. 



19. Dermal tubercles, possibly of Cladoselache. Marcel his 

 shale ; Le Roy, New York. 



20. fPsammodus antiquus Newberry. Columbus limestone; 

 Ohio. 



21. Onchus sp. Middle Devonian; Gaspe, Province of Que- 

 bec. 



22. Ctenacanthus wrighti Newberry. Moscow shale (Upper 

 Hamilton) ; Yates county, New York. 



