SKULL OF A HUMAN FETUS 



CHARI.es CLIFFORD MACKI.IN 



PLATE 11 



comm. for. 

 prae- prue- 

 iiprv. optic. fliiartin. chiasm, sept, iiiterorh. 



al.T, orb. 



right Ectethnioid, 

 (post, extremity) 



ala temp. 



nerv. trigem. II. — ^ 



gang, sphenopal. V'' \ \'"^ v'-\' 

 ala temp. 

 Palat. (right) ''^M^-'' >V 



left Ectethmoid 

 post, extremity) 



fi.ss. cup. sept. 



prop. cup. pest. 



Palat. (left) 



na.sophar.\nx 

 oropharynx 



14 Coronal section through head showing dorsal part of ethmoidal and ven- 

 tral part of orbitotemporal region. Asymmetry is due to obliquity of section. 

 The posterior cupular i)rocess on the left side (right side of illustration) is shown 

 joining with the side wall; on the other side, in which the ])hin(> of section is 

 l)osterior, the j)rocess is comj)letely joined to the ectethmoid. 



3S1 



