DESIGNATIONS FOR PLATE IV. 



1. Superior sagittal sinus of dura mater. 25. 



2. Lateral ventricle. 26. 



3. Cerebral hemisphere. 27. 



4. Pia mater. 28. 



5. Frontal bone. 29. 



6. Cartilage of orbital wing. 30. 



7. Mesethmoid cartilage. 31. 

 S. Cupula posterior cartilage. 32. 

 9. Obliquus superior muscle. 33. 



10. Ophthalmic vessels and nerves. 34. 



11. Levator palpebrae superioris muscle. 35. 



12. Rectus medialis muscle. 36. 



Nasal tract; choana. 

 Palatine bone. 

 Oral cavity. 

 Palatine nerve. 

 Sphenopalatine ganglion. 

 Infraorbital vein. 

 Internal maxillary artery 

 Ma.xillary nerve. 

 Maxilla. 



Zygomatic bone. 

 Submaxillary duct. 

 Buccinator muscle. 



-^4 



13. Retractor bulln muscle. 



14. Rectus inferior muscle. 



15. Sclera. 



16. Retina and chorioidea. 



17. Vitreous body. 



18. Lens. 



19. Posterior chamber of eye. 



20. Anterior chamber. 



21. Cornea. 



22. Ciliary body and iris. 



23. Upper eyelid. 



24. Lower eyelid. 



37. Masseter muscle. 



38. Parotid duct. 



39. Facial nerve. 



40. External ma.xillary artery and vein 



(anterior facial vein). 



41. Platysma muscle. 



42. Inferior labial artery and vein. 



43. Mandible. 



44. Genioglossus muscle. 



45. Digastricus muscle. 



46. Quadratus labii inferioris muscle. 



47. Geniohyoideus muscle. 



58 



