A CLINICAL STUDY OF THE SKULL. 



47 



Hindoo/ Bengalese,^ a North American Indian (Lenape),an'^ Anglo- 

 American lunatic, and one unnamed. 



Fig. 8. — View within the anterior nasal aperture of an adult negro (No. 

 927, A. N. S.) 



1. Nasal bone. 



2. Frontal bone, forming at this place a keel instead of a spine. 



3. Perpendicular plate of the ethmoid bone. 



4. Ascending process of the maxilla. 



5. Lateral mass of the ethmoid bone. 



6. Inferior turbinated bone. 



7. Alveolar process. 



Thus ten well-defined examples of the nasal plate of the frontal 

 bone were met with. With reference to this conclusion it is stated 

 I have met it in 56 out of 76 negro skulls, and it would appear that 

 we have in the nasal plate a valuable guide to the identity of this 

 race. These facts lead me to consider 



6. The Region at which the Frontal Bone Forms Part of the Nasal 



Chamber. 



The frontal bone as it enters into the composition of the nasal 

 chamber is usually described in forming a nasal spine.* 



I have found that in the child the nasal portion of the frontal 

 bone is of a different form from that described, and that in the adult 



1 No. 763. 2 No. 40. 



'Hoffman's " Lehrbuchder Anatomie des Menschen : " describes the " pars 

 nasalis " as yielding a sharp process of variable length — the spina nasalis supe- 

 rior — which extends between the nasal bones and the perpendicular plate of 

 the ethmoid bone. This description may be accepted as representative ot 

 those found in the text-books. 



