PLATE XVII. 



Fig. 



1. ElonicldJiys Aitkeni, Traquair; head of a specimen; natural size. From the 



Dalenioor Rake Ironstone, Stanton, Derbyshire. Formerly in the Collection of 

 the late Mr. 1^. W. Binney, of Manchester; now in the Woodwardian Museum, 

 Cau)bri(lge. 



2. Elonichthys ^^7/l•6';^^, Traquair ; scale from the flank of a Lancashire specimen 



(Arley Mine, near Burnley) ; magnified. 



3. Filonichthys Aifkeni, Traquair; scale towards ventral margin ; magnified. 



4. E/o/fic/if//j/s Jifkeni, Traquair ; maxilla; magnified about two diameters. 



5. Vjlonichthys Aifheni, Traquair : dentary of mandible ; magnified about two 



diameters. 



6. Elonicht/iys Aitkcfii, Traquair; articulations of rays of dorsal fin ; magnified. 



7. Efonichthys Aitkeni, Traquair ; head and anterior part of body of a s|)ecimen from 



the " Culm " of Instow, Devonshire. Referred to at page 79. 



S. Elonichthys Binneyi, Traquair; natural size. From the Dalemoor Rake Ironstone, 

 Stanton, Derbyshire. Formerly in the Collection of the late Mr. E. W. Binney, 

 of Manchester; now in the Woodwardian Museum, Cambridge. 



9. E/o//ic/////ys Bi/if/eyi, Traqwniv ; flank scale ; magnified. 



10. Eloiiichf/iys Binneyi, Traquair; scale from caudal region ; magnified. 



11. Elonichthys Eobisoni, Hibbert, sp., var. nemopierus ; nntural size. This is 



the counterpart of the type specimen of Agassiz's Aiiiblypterus Hemopfcnis 

 figured in ' Poissons Fossiles,' vol. ii, pi. \\b, fig. 1, and is now in the 

 British Museuui. Calcifeious Sandstone Series, VVaidie. 



12. VJonichtliyH Rohiso/ii, Hibbert, sp., var. nemopterus ; [)ectoral fin from the other 



half of the same fish ; slightly magnified. 



