EXPLANATION OF PLATE 3. 
17.— Dzongbuk shales. 
16. — Alveolina limestone. 
15. — Sandy shales. 
14. — Orbitolites limestone. 
13, — Spondylus shales. 
12. — Operculina limestone. 
II. — Gastropod limestone. 
10. — Ferruginous sandstone. 
9. — Tiina limestone. 
8. — Third limestone. 
7. — Shaly limestone. 
6. — Second limestone. 
5.— Shales. 
4. — First limestone. 
Figs 2 and 3. 
2. — Kampa shales. 
