BY D. MAWSON. 



417 



of aboufc"*^ 150 ft. brought us to the top of a recent raised coral 

 reef in which Orbicella sp. was recognised. Just beyond this 

 point a steep descent of 50 ft. brought us to the river-bed, where 

 a collection of rolled pebbles was made. Several of these speci- 

 mens proved to be pyroxene andesites, one a uralite porphyry,! 

 whilst two others appear to belong to the same parent-type as 

 the latter, but differ in degree of metamorphism. The river at 

 this spot cuts through quite 50 ft. of drift material, which 

 had probably been laid down on an extensive scale at a time 

 previous to the uplift indicated by the neighbouring raised reef. 

 On arriving at the beach, we examined the deposits of magnetite 

 iron sand(2) extensively developed along this coast. 



Our second excursion from Atchin was directed to the village 

 of LaleppeJ and resulted in several interesting discoveries. Our 

 route lay direct to Bartaleppe, thence by a detour after mounting a 



Fig. 2. Sketch section from Atchin to Laleppe, North Malekula. 

 sharp spur we arrived at Laleppe. Turning to the left and 

 partly doubling back we continued to rise to the point 1145 ft. 

 high indicated on the chart. A rapid descent brought us to 

 Bartaleppe again. In the woodcut (text-fig. 2) a slightly 



* Our aneroid got out of gear, and we were obliged for several months to 



calculate the heights as best we could. Later on, however, Professor David 



forwarded an excellent instrument, lent by Mr. G. H. Knibbs, F.R.A.S., by 



which, with the aid of a vernier, readings could be readily taken to one foot. 



t For description, refer to Part ii. , Section 3, § 9. 



it Such names may be spelt either Laleppe or Lalembe, as it appears on 

 the Admiralty chart. 



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