﻿PLATE II. 



Fio. 



1. Restored figure of Ainblypterus latus, Agass. Lower Permian of Lebach, Saar- 



brucken, &c. 



2. Sketch of the bones of the head in Oseygnathus omatus, Egerton. — Lower Lias, Lyme 



Regis ; reduced ^th : c. h. cerato-hyal, covered by the branchiostegal rays, except 

 at its anterior extremity j the dotted lines indicate its contour as seen through 

 the rays which are compressed over it ; ar. articular ; qu. quadrate. The other 

 lettering as in the preceding Plate I. From a fine specimen in the Museum of 

 Practical Geology. 



3. Sketch of the bones of the lower aspect of the head and shoulder in Oxyynathus 



omatus ; reduced ^. From one of the type specimens in the Collection of Sir 

 Philip Grey Egerton (that whose tail is represented in pi. ix*, 'Dec. Geol. 

 Survey,' viii, 1855). 



4. Diagram to show the arrangement of the branchiostegal rays, &c, in Gonatodus 



punctatus, Agass., sp. Calciferous Sandstone Series, Wardie. Lettering as in 

 fig. 2, &c, Plate I. 



5. A fragmentary and dislocated head of Gonatodus punctatus, showing the para- 



sphenoid {pa. s.), the operculum {op.), interoperculum (i.op), part of the clavicle 

 (c/.), maxilla (mat.), and mandible (d.), as shown in impression ; enlarged ^th. 

 Collection of the Author. 



6. Diagram of the facial bones in Bhabdolepis macropterus, Bronn, sp. Lower Per- 



mian, Lebach, &c. : s. o. suboperculum. The other lettering as in the figures of 

 Plate I. 



7. Diagram of the opercular bones in Cosmopfyc/iius striatus, Agass., sp. Calciferous 



Sandstone Series, Wardie. 



8. Head of Elonichthys Eyertoni, Agass., sp. Coal-measures, North Staffordshire ; 



enlarged 2 diameters. The branchial cavity is exposed, and portions of three of 

 the branchial arches seen in its upper part. In the Collection of Mr. John Ward, 

 F.G.S., Longton. 



9. Head of a species of Elonichtliys compressed vertically, and the upper part gone so 



as to expose the median line of basi-branchials, and portions of three branchial 

 arches on the left side, of two on the right. Calciferous Sandstone Series, South 

 Queensferry, Linlithgowshire. In the Collection of the Author. 



