34 THE ATRIUM VESTZ. 
tegule bipedales of the yellow type so common in floors of the period. The 
courses of brick measure from 3.30 to 3.70 centimeters and the layers of 
mortar from 1.50 to 1.75 centimeters. ‘The bricks, which are in part made 
from roof-tiles, are magenta-red in color and of a finer texture than those of 
the preceding periods. While the quality is in general good, the bricks have 
not been properly burned. The mortar is finer than in the last period. The 
concrete foundations are noticeable from the almost exclusive use of selce 
as filling. 
