332 Jacob Parsons Schaeffer. 
have their floors, at varying distances, inferior to the floor of the 
nose. Sixty adult specimens were examined to ascertain this 
relation, with results as appended: 
NUMBER SINUS FLOOR NOSE FLOOR SAME 
EXAMINED INFERIOR INFERIOR LEVEL 
60 39 12 9 
The difference in levels of these two floors, when not in the 
same plane, varies from one-half to 10 mm. C. Resschreiter 
says that it is a male characteristic to find the sinus floor at an 
Fie. 8 (X. 385). Photograph of a dissection of the sinus maxillaris and 
frontalis from a ventral view. 
S. Fron., S. Max., = sinus frontalis et maxillaris, respectively. 
inferior level to the nasal floor. I have, however, been unable 
to verify this statement, and give the following as typical of my 
findings: 
NUMBER SINUS FLOOR NOSE FLOOR SAME 
EXAMINED INFERIOR INFERIOR LEVEL 
12 (female) 9 2 1 
ea a ee 
