SKELETON OF THE WILD DUCK. 



THE SKULL. 313 

 11 



FIG. 60. A. Ventral view of the cranium of a Duck (Anas boschas). 

 B. Cranium and mandible seen from the left side, x 1. 



1. maxilla. 22. 



2. premaxilla. 23. 



3. anterior nares. 24. 



4. nasal process of premaxilla 



(fig. 59). 25. 



5. nasal. 



6. frontal (fig. 59). 26. 



7. lachrymal. 



8. postfrontal process. 



9. parietal (fig. 59). 27. 



10. jugal. 



11. quadratojugal. 



12. quadrate. 



13. condyle of mandible. 



14. posterior articular process. 



15. dentary at symphysis. \ 28. 



16. basi-hyal. I (fig. 29. 



17. uro-hyal. 59). 30. 



18. basibranchial. 31. 



19. vomer. I. 



20. palatine. mina. 



21. pterygoid. 



anterior palatine foramen. 



basitemporal. 



foramen leading into tympanic 

 cavity. 



bristle inserted into posterior 

 opening of carotid canal. 



bristle inserted into posterior 

 opening of Eustachian 

 canal. 



bristle emerging through an- 

 terior opening of carotid 

 canal. Close by is seen the 

 bristle emerging through 

 the anterior opening, of the 

 Eustachian canal. 



fenestral recess. 



maxillo-palatine. 



lambdoidal crest. 



rostrum. 



II. IV. V. IX. X. nerve fora- 



