EXPLAXATION OF PLATE II. 



Fig. 1. — View of the galleries, drawQ from nature, showing the 

 Columnar architecture. A side view into four galleries is given, (a, a) 

 and the formation of stories and half .stories shown. The smooth sur- 

 face with window-like openings, at the side of the figure, is the plane 

 cut by the saw in dividing the block. See page 277. This view re- 

 presents the galleries in their natural position as found in the beam, 

 the top of the figure being above, the bottom below. 



Fig. 2. — The triangular chamber described on page 278. i, the 

 chamber; c, the floor of hall beneath ; d, window; c, side entrances. 



Fig. 3. — A view of a section of the roof of the main formicary, 

 showing the termination above of the galleries. It also indicates the 

 internal character of the Cavernous architecture outlined in Plate III 

 figures 2 and 3. See page 278. 



