GUAM. 367 



height from 300 to 500 feet (PI. 194, figs. 1, 2). The lower part of their 

 faces is riddled with ci^evasses and cracks, and at a higher level, probably 

 on the face of the fourth or fifth terrace, numerous caverns crop out. 



We struck the east coast of Guam near Point Hanoum ; the vertical 

 cliffs of the east face consist of elevated coralliferous limestone, rising at 

 the northern extremity of the island to more than 300 feet (PI. 194, fig. 1). 

 They flank the eastern shore of the island from Point Ritidian, the north- 

 ernmost point of the island, as far as Port Pago; there the vertical cliffs 

 become indistinct patches and isolated cliffs resting upon the volcanic massif 

 of the southern half of the island. Magnificent terraces can be traced in 

 all directions, indicating the periods of- rest during the elevation of Guam 

 (PL 194, figs. 1, 2). The vertical cliffs representing the lower terraces are 

 deeply pitted, honeycombed, furrowed, and distorted. 



On the east coast, north of Point Anao, some of the coralliferous 

 limestones are stratified, dipping towards the sea ; others, nearer the 

 northern extremity, show evidence of great 

 disturbance, probably caused at the time of 

 their elevation, when Sta Rosa Peak burst 

 through the coralliferous limestones in the 

 interior of the northern part of tbe island 

 (PL 198, fig. 3). They resemble in every 

 way those of similar limestone islands, such 

 as Makatea, Niue, Eua, Vavau, and others ' 

 in Fiji, with which we had become famil- 

 iar in our explorations. Outside of Viti 'i'"isTi:D ^tuaia. East Face of 



Gdam, South of Patay Point. 

 Levu and Vanua Levu, Guam is the largest 



island we visited, composed in part of volcanic rocks and of elevated 



coralliferous limestone. 



At the northern extremity of Guam are five distinct terraces ; the first 



and second are somewhat lower than the third and fourth ; the mass of 



vegetation growing on the slopes sloughed off from the limestone bluffs, 



has, at many points, obliterated all traces of the terraces. Taragay Bay, 



at the northern extremity of Guam, is an immense sandy flat, flanked by 



a comparatively broad reef platform (PL 233, fig. 4), full of horse-heads 



