PLATE XVIII. 



Fig. 



1. Elonichthi/s Egertoni (Egertoii) ; natural size. From the Deep Mine Ironstone, 



Longton, Staffordshire. In the Ward Collection, British Museum. From a 

 drawing by the Author and Mrs. Traquair. 



2. Flank scale of the same species, outer surface ; magnified seven diameters. 



3. Inner surface of a similar scale; magnified seven diameters. 



4. Elonichthys Portlocki, Egerton, sp. A fragment from the Lower Carboniferous of 



Moyheeland, Ireland. In the Egerton Collection, Britisii Museum. 



5. Portion of a head of the same species from the same locality, and also in the 



Egerton Collection, British Museum. 

 6 and 7- Scales of the sauie species, magnified. 



8. Elonichthys nndtktriatiiSi'^yi\(\\m\x ■, five sevenths natural size. From the Gilmerton 



Ironstone, Midlothian. 



9. Maxilla of the same species; natural size; from the same ironstone. In the 



Collection of the Antiior. 



10. Flank scale of the same species; maguified ; from the same ironstone. Author's 



Collection. 



11. Inner surface of a similar scale ; magnified; also in the Author's Collection. 



