AGASSIZ: FIJI ISLANDS AND CORAL REEFS. 161 



PLATE 33. 

 Tlie Island of Ovalau seen from the east. 



PLATE 34. 

 Levuka (Ovalau) seen from outside the Barrier Reef. 



PLATE 35. 



Flats of Volcanic Mud to north of channel of Barrier Reef, looking southwest from 

 Mbau. 



PLATE 36. 



Viwa Island, Mbau Waters, composed of stratified volcanic mud. North of channel 

 of Barrier Reef. 



PLATE 37. 



Nasilai Barrier Reef seen from the east. Negro-heads of elevated limestone. 

 Nasilai Light in distance. 



PLATE 38. 

 Nukulau and Mokaluva Islands seen from the southwest. 



PLATE 39. 



On north shore of Nukulau Island, elevated limestone beach. 



PLATE 40. 



Nukulau Island Barrier Reef Flat from the southeast. Negro-heads, elevated / 

 limestone. 



PLATE 41 



Nukulau Island Barrier Reef Flat, extension to line of Breakers. 



PLATE 42. 



Fringing Reef Flat off Koro Levu, east coast of Viti Levu. Negro-heads, volcanic 

 rocks. 



PLATE 43. 



Fringinji; Reef Flat south of Singatoka River. Elevated limestone outliers along 

 the shore. 



PLATE 44. 

 Sand Dunes north of Singatoka River. Fringing reef has disappeared. 



PLATE 45. 

 South Point of Thuvu Harbor. Elevated limestone and fringing reef. 



VOL,. XXXIII. 11 



