ANDREWS : LIMESTONES OF THE FIJI ISLANDS. 49 



PLATE 18. 



Limestone cliffs at Thithia. On the left is shown the typical limestone cliff slope ; 

 in the central part is shown a stage in vertical cliff formation. 



PLATE 19. 



General andesite outburst on Thithia. The little tufts of vegetation on the left 

 mark the site of limestone. 



PLATE 20. 



Old lagoon outlet on Thithia. 



PLATE 21. 

 Gap in raised limestone, Thithia. 



PLATE 22. 



Part of Vanua Mbalavu Lagoon, seen from the 600-foot level behind Loma Loma. 

 Yama Yama is the andesite cone in the middle distance with Munia over it 

 and Susui to the right. 



PLATE 23. 



Andesite slope, Naitamba. 



PLATE 24. 



Naitamba, looking over the central hollow towards the old lagoon outlet and 

 the broken cliff of the old limestone ring. 



PLATE 25. 

 Vatu Vara (1100 feet high) from the beach. 



PLATE 26. 

 Vatu Vara. Two lines of marine erosion 15 and 30 feet above high-water mark. 



PLATE 27. 



Sub-horizontal summit of Yathata, showing the sharp line of demarcation be- 

 tween the volcanic and limestone formation indicated by the marked difference 

 in the vegetation. The foreground is a steep andesite slope which has poured 

 over into the limestone in the middle ground. The lava flow is covered with 

 grass, the limestone with a thick forest. 



PLATE 28. 



Cliff on the western coast of Vatu Leile, showing the vertical cliff, from 100 to 110 

 feet in height, the long lines of former sea erosion, the " Great Walk," six feet 

 above high-water mark, and the present shelving beach. 



