■I 



X 60 



Fig. 59- — Figures of various Structures and States of Preservation. 



i' ._. I. — Portion of two laminae and intervening serpentine, with clirysotile vein. 



id) Proper wall tubnlaicil. (b) Intermediate skeleton, with large canals. 



(c Openings of small chamberlets filled with serpentine. (s) Serpentine 



filling chamber. (i') Vein of chrysotile, showing its difference from the 



proper wall. 

 Fig. 2. — Junction of a canal and the proper wall. Lettering as in Fig. i. 

 Fig. 3. — Proper wall shifted by a fault, and more recent chrysotile vein not faulted. 



Lettering as in Fig. i. 

 Fig. 4. — Large and small canals filled with dolomite. 

 Fig. 5. — Abnormally thick portion of intermediate skeleton, with large tubes and 



small canals filled with dolomite. 



237 



