﻿PLATE III. 



Fig. 



1. Cosmoptychius striatus, Agass., sp. ; natural size; the most perfect specimen known. 



From the Calciferous Sandstone Series, Wardie. The bones of the right side 

 of the head are seen from their inner surfaces. In the Collection of the Author. 



2. Another specimen of the same species from the same locality, showing the pectoral, 



but deficient in the anal and caudal fins. In the Hugh Miller Collection, 

 Edinburgh Museum of Science and Art. 



3. Head of the same species ; natural size ; to show the sculpture of the facial bones 



and the arrangement of the branchiostegal rays. The facial bones are drawn from 

 a squeeze in modelling wax of the impression of their outer surfaces, occurring 

 on the counterpart of the specimen. Specimen in the Edinburgh Museum of 

 Science and Art. Collected at Wardie by Mr. C. W. Peach. 



4. Dentition of the lower jaw of the same specimen ; magnified six diameters. 



5. Scale from the flank oi Cosmoptychius striatus ; magnified four diameters. From the 



Calciferous Sandstone Series, Craigleith, and in the Edinburgh Museum of Science 

 and Art. 



6. Inner surface of a similar scale from Wardie, magnified three diameters. 



7. Scale from a position more towards the ventral aspect ; magnified a little over four 



diameters. From Craigleith. 



8. Sculpture of the joints of the dorsal fin-rays of the specimen represented in Fig. 2 ; 



magnified. 



9. Head of Elonicldhjs semistriatus, Traquair. Seen from below and reduced ^th. 



From the Coal-measures (Knowles Ironstone) of Fenton, Staffordshire. Museum 

 of Practical Geology. 



I. 0. Lateral view of the same specimen; reduced yth. 



II. Portion of the specimen of Elonichthys semistriatus, referred to in the text as 



"No. 2," to show the dentition; natural size. Coal-measures, Fenton. In the 

 Collection of Mr. Ward. 

 12. Tail of the same species; reduced |th. In Mr. Ward's Collection, and from the 

 same locality. 



