PLATE XV. 



Fig. 



1. Blonichthys Rohisoni, Hibbert, sp., siib-var. Bucldundi ( = Pygopterus Bucklandi, 



Agassiz) ; natural size. From Calciferous Sandstone Series, Burntisland, 

 Fifeshire. In the Museum of Science and Art, Edinburgh. 



2. Elonichthys Robisoni, Hibbert, sp., aub-var. Bucklandi ; anothei- specimen from the 



same horizon and locality ; natnral size. Showing the dorsal, anal, and part 

 of the caudal fins. Formerly in the Collection of the late Dr. J. R. S. Hunter- 

 Selkirk, of Braidwood ; now in the Museum at Kilmarnock. 



'6. Elonichthys Robisoni, Hibbert, sp., sub-var. Bi/cklandi ; scale from the commence- 

 ment of the caudal region ; magnified six diameters. 



