PLATE II. SKIAGRAM OF SKULL FROM THE FRONT, SHOWING THE FRONTAL SINUSES, THE ETHMOIDAL AIR-CELLS, AND THE MAXILLARY SINUSES.
NOTE.-The B.N.A. nomenclature, alone, is included in the index, as references to the English terms will be found in the text. Figures in heavy type refer to the pages on which structures are most exhaustively described.