X 60 



Fig. 59. — Figures of vaiious Structures and States of Preservation. 



Fig. I. — Portion of two laminae and intervening serpentine, with chrj-sotile vein. 



{a) Proper wall tubulated. (b) Intermediate skeleton, with large canals. 



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



filling chamber. (j>) Vein of chrysotile, showing its difference from the 



proper wall. 

 Fig. 2. — Junction of a canal and the proper wall. Lettering as in Fig. 1. 

 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 



