Key to Skeleton of the Perch 



1. Frontal bone. 



2. Pre-frontal bone. 



3. Ethmoid bone. 



4. Post-frontal bone. 



5. Basi-occipital bone. 



6. Basi-sphenoid bone. 



7. Parietal bone. 



8. Supra-occipital bone. 



9. Paroccipital bone. 



10. Exoccipital bone. 



1 1 . Alisphenoid bone. 



12. Mastoid bone. 



13. Squamosal bone. 



14. Orbitosphenoid bone. 



15. Basisphenoid bone. 



16. Vomer. 



17. Inter- or Pre-maxillary 



bone. 



18. Maxillary bone. 



19. Infra-orbital ring. 



20. Turbinals. 



22. Palatine bone. 



23. Hyomandibular bone. 



24. Pterygoid bone. 



25. Entopterygoid bone. 



26. Quadrate bone. 



27. Metapterygoid bone. 



28. Operculum. 



29. Stylohyal bone. 



30. Praeoperculum. 



31. Symplectic bone. 



32. Suboperculum. 



33. Interoperculum. 



34. Dentary. 



35. Articulary. 



36. Angular bone. 

 37.]Epihyal and Ceratohyal 

 '?8.| bones. 



79- 

 80. 



81. 



iBasihyal bones. 



Glossohyal bone. 

 Urohyal bone. 

 Branchiostegal rays. 

 Post-temporal bone. 

 Supraclavicula. 

 Clavicula. 



^Post-clavicula. 



Coracoid (radius) bone. 



Scapula (ulna). 



Carpals and metacarpals. 



Basibranchials. 



Ceratobranchials. 



Upper epibranchial of first 



branchial arch. 

 Epibranchials. 

 Upper pharyngeals. 

 Gill-rakers. 



^Abdominal vertebras. 



Caudal vertebrae. 



Hypural bone. 



Caudal rays. 



Ribs. 



Epipleural spines. 



Interneural spines. 



Dorsal rays. 



First interneural spine. 



Rudimentary caudal 



rays, 

 Interhaemal spines. 

 Pubic bones. 

 Ventral spine. 



