438 



PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [DeC. 15, 



The following Table gives a connected view of the genera of fishes 

 found in our British Old Eed Sandstone, with their number and 

 distribution in the three zones I have indicated, and may serve also 

 for the comparison I have endeavoured to establish between the Old 

 Eed Sandstone of Scotland and England, on the one part, and the 

 mixed Devonian formations of Eussia on the other. (See p. 415.) 



Table II. — Distribution of the Species. 



Placodermata. 



Pterichthys 



Hemothorax ? . . . 



Placothorax 



Polyphractus ... 



Cephalaspides. 



Coccosteus 



Cephalaspis 



Pteraspis 



Acanthodii, 



Acanthodes 



Cheiracanthus . . . 

 Diplacanthus ... 



Cheirolepis 



Dipterini. 



Osteolepis 



Diplopterus 



Glyptopomus ... 



Triplopterus . . . 



Ccelacanthi. 



Grlyptolepis 



Phyllolepis 



Holoptychius ... 



Q-lyptolsemus*... 

 Phaneropleuron* 

 Actmolepis ... 

 Platygnathus 



Dipterus 



Dendrodus ... 

 Conchodus ... 

 Lamnodus ... 



Cricodus 



Asterolepis ... 

 Bothriolepis... 



Caithness and Orkney ; Bussia 



Dura Den 



Elgin 



Caithness 



Lower. 



Caithness, Cromarty, Gamrie ; Bussia. . 

 Forfarshire, Shropshire, Herefordshire 

 Shropshire, Herefordshire 



Elgin 



Gamrie, Stromness, Lethen Bar, Cromarty 

 Caitlmess, Strom ness, Lethen Bar, Cromarty 

 Orkney, Gamrie, Lethen 



Caithness, Gamrie, Lethen Bar, &c. 

 Caithness, Lethen Bar ; Bussia. ... 



Dura Den 



Orkney 



Bussia 



Lethen, Elgin, Gamrie ; Bussia 



Clashbinnie 



Elgin, Clashbinnie, Dura Den ; Eifel and 



Bussia. 



Dm'a Den 



Dura Den 



Findhorn; Bussia 



Orkney, Dura Den ; Bussia 



Caitlmess, Lethen, Cromarty; Bussia... 



Elgin, &c.; Bussia 



Scat Craig, Elgin 



Elgin; St. Petersburg 



Elgin; Biga 



Elgin; Biga, St. Petersburg 



Clashbinnie, and everywhere in upper 



beds; siho Bussia 



Orkney 



Gyroptychius ... 



Ichthyodorulites — ^Excluded from this list as imperfect. 



Middle. 

 9 



2? 



5 

 6 

 4 



5 

 6 



1 



2 



3? 



4 



1 



3 



1 



4 



2 

 2 



Upper. 



2 

 1 



* Gen. nov. Huxley. 



