ON THE FOSSIL. FISH OF THE DEVONIAN SYSTEM. 



87 



What we possess of them is nothing more than some detached scales, isolated 

 teeth, and some broken bony plates. 



This primitive diversity of the ichthyoid types of a formation so ancient 

 as the old red sandstone, is, in my opinion, one of the facts the most con- 

 tradictory to the theory of the successive transformation of species, and of 

 the descent of organized beings now living from a small number of primitive 

 forms. 



In support of these general observations I add the synoptical table of all 

 the species of this formation which I have to the present time been able to 

 determine, and of which the detailed descriptions will be found in my 

 ' Monograph.' 



Synoptical Table of the Fossil Fishes of the Old Red Sandstone, or Devonian System. 



Placoidians. 



Onchus arcuatus, Ag. — Wales. 



semistriatus, Ag. — Wales. 



Ctenacanthus ornatus, Ag. — Sapey and 

 Abergavenny. 



Ctenoptychius priscus, Ag. — Scotland. 



Ptychacanthus dubius, Ag. — Aberga- 

 venny. 



2 genera yet undetermined. — Babrodery 

 and Elgin. 



Ganoidians. 

 1st Group. 



Acanthodespusillus.^jr. — Gordon Castle. 

 Diplacanthus striatus, Ag. — Cromarty, 

 striatums, Ag. — Lethen 

 Bar. 



longispinus, Ag. — Lethen 

 Bar and Cromarty. 



crassispinus, Ag. — Caith- 

 ness. 

 Cheiracanthus Murchisonii, Ag. — Gam- 

 rie. 



minor, Ag. — Stromness. 

 microlepidotus, Ag. — Le- 

 then Bar. 

 Cheirolepis Cummingiaa, Ag. — Lethen 

 Bar and Cromarty. 



Traillii, Ag. — Pomona. 

 Uragus, Ag. — Gamrie. 



2nd Group. 



Pterichthys Milleri, Ag. — Cromarty. 



productus, Ag. — Lethen Bar. 



latus, Ag. — Lethen Bar. 



cornutus, Ag. — Lethen Bar. 



testudinarius, Ag. — Cro- 

 marty. 



oblongus, Ag. — Cromarty 

 and Gamrie. 



cancriformis, Ag. — Orkney. 



Pterichthys hydrophilus, Ag. — Dura 



Den. 

 Coccosteus oblongus, Ag. — Lethen Bar. 

 latus, Ag. — Caithness and 

 Orkney. 



cuspidatus, Ag. — Cromarty 

 and Gamrie. 

 Cephalaspis Lyellii, Ag. — Glammis. 



rostratus, Ag. — Whitbach. 

 Lewish, Ag. — Whitbach. 

 Lloydii, Ag. — Shropshire. 



3rd Group. 

 Osteolepis macrolepidotus, Ag. — Caith- 

 ness and Cromarty. 



microlepidotus, Ag. — Caith- 

 ness. 

 major, Ag. — Lethen Bar. 

 arenatus, Ag. — Gamrie. 

 Dipterus macrolepidotus, Cuv. — Caith- 

 ness and Wales. 

 And several varieties of this species. 

 Diplopterus macrocephalus, Ag. — Lethen 

 Bar. 



borealis, Ag. — Caithness, 

 affinis, Ag. — Gamrie. 

 Glyptolepis leptopterus, Ag. — Lethen 

 Bar. 



elegans, Ag. — Gamrie. 



4th Group. 

 Holoptychius nobilissimus, Ag. — Clash- 

 bennie. 



Flemingii, Ag. — Dura Den. 

 giganteus, Ag. — Scotland. 

 Dendrodus biporcatus, Owen. "J 

 sigmoideus, Owen. 



Corn- 



incurvus, Owen. '« stone in 



Murray- 

 shire. 



latus, Owen. 

 compressus, Owen. 

 strigatus, Owen. 

 Platygnathus paucidens, Ag. — Caith- 

 ness. 



Jamesoni, Ag. — Dura Den. 

 minor, Ag. — Dura Den. 



