90 GANOID FISHES OF THE CARBONIFEROUS FORMATION. 



the edge of the stone, but its rays, so far as they are seen, have the same character as 

 those of the anal in the Eskdale specimen, and it so happens that in this specimen it is 

 the anal which is deficient. The paired fins are not seen at all. The ridges of the 

 cranial roof plates pass into tubercles just at the posterior margin of the parietals. The 

 sculpture of the scales is identical in the two specimens, 1 but in this one from Gullane at 

 least five specially large azygous scales are seen in the middle line of the back just in 

 front of the dorsal fin. 



Bemarhs. — Of these two specimens the first is from Glencartholm near Langholm, 

 in Eskdale, and belongs to the Royal Scottish Museum ; the second is from the 

 neighbourhood of Gullane, in East Lothian, and is in the collection of the Geological 

 Survey of Scotland. This latter specimen is perhaps entitled to rank as the type as my 

 original brief diagnosis of E. striatulus was entirely founded upon it, while the Eskdale 

 example was oidy alluded to as referable to the same species. But as the two are 

 undoubtedly specifically identical, and as both contribute to our knowledge of this rare 

 form, it is best to consider them as " co-types." 



I have placed the little fish in the genus Elonichlhys on account of its general 

 aspect, and the form and position of the unpaired fins, though the condition of the 

 fin-fulcra deviates considerably from that which is usual in the genus. In all its details 

 it is strikingly different from every other known species. 



Finally, Elonichlhys striatulus is one of the very few species common to the peculiar 

 Lower Carboniferous fish-fauna of Glencartholm, in Eskdale, and that of Central 

 Scotland on the north side of the Southern Uplands. Consideration of the question of 

 the distribution of the genera and species of British Carboniferous Paloeoniscidae will, 

 however, be deferred to the conclusion of this Monograph. 



Geological Position and Localities. — The only two specimens known have occurred 

 in Lower Carboniferous Shales, in two widely separated localities, namely Glencartholm, 

 in Eskdale, Dumfriesshire, and the neighbourhood of Gullane, in East Lothian. In the 

 last-named locality E. striatulus is associated with an assembly of other P.daeoniscidcc, 

 which seems to indicate that the horizon is probably that of the Wardie Shales in the 

 Edinburgh District. 2 



APPENDIX TO ELONICHTIIYS. 



The following have been described without figures as new species of Elonichthys by 

 Mr. E. D. Wellburn, of Sowerby Bridge. I have not seen the specimens on which they 



1 It is from this Gullane specimen that the magnified representations of scales (figs. 4 and 5) 

 were taken. 



8 See the author's paper, " Eeport on Fossil Fishes collected by the Geological Survey of Scotland 

 from Shales exposed on the Shore near Gullane, East Lothian," ' Trans. Eoy. Soc. Edinb.,' vol. xlvi, 

 pt. i, no. 4 (1907). 



