THE SKELETON OF THE CODFISH. UPPER JAW. 99 



representatives of the palato-ptery go-quad rate bar of the 

 Dogfish. 



FIG. 12. MANDIBULAR AND HYOID ARCHKS OF A COD (Gadus 



morrhua) x (Brit. Mus.). 



1. palatine. 



2. meso-pterygoid. 



3. pterygoid. 



4. quadrate. 



5. symplectic. 



6. meta-pterygoid. 



7. hyomandibular. 



8. angular. 



9. articular. 



10. dentary. 



11. inter- hyal. 



12. epi-hyal. 



13. cerato-hyal. 



14. hypo-hyal. 



15. uro-hyal. 



16. branchiostegal rays. 



The quadrate is united behind with the symplectic 

 (fig. 12, 5), and the meta-pterygoid with the symplectic and 

 hyomandibular, both of which bones will be described im- 

 mediately in connection with the hyoid arch. 



72 



