BY D. MAWSON. 421 



This coarse variety gives way in parts to a very fine-grained 

 chocolate -coloured rock recalling some of the shaly tuffs of the 

 Wai Malikoliko, S.W. Santo. 



6. Miocene limestone in situ at the amil above Laleppe. It is 

 a hard Lepidocyclina-Lithothamnion limestone containing small 

 fragments of a basic eruptive rock, and of a fine-grained sub- 

 marine tuff. 



7. Fine-grained grey siihmarine tuffs containing abundant 

 Globigerina. They are well bedded, finer-grained beds several 

 cms. thick alternating with coarser beds in which tiny pellets of 

 white pumice are visible. This structure strongly resembles that 

 of the soapstones at Largeaux's plantation in Efate. 



Dr. Hinde described three rock-specimens collected by Lieut. 

 Frederick from Malekula : — 



{a) From Rocky Point, Sasun Bay, at 3 ft. above sea-level. A 

 brownish compact claystone, containing a few Globigerina casts. 

 The matrix was recognised as being composed of very fine 

 volcanic material. This rock tallies with the Miocene submarine 

 tuffs collected by us further north, and also with some of the 

 bands of the Efate soapstones. 



{b) From the same locality at 10 ft. above sea-level. A grey 

 soft granular limestone with nullipores, foraminifera, etc. 



(c) From Port Stanley, at an elevation of 550 ft. A white 

 limestone, in which, among other forms, Lithothamnion was 

 recorded. 



We collected specimens of what must be the same limestone, 

 and find that it is probably to be relegated to some part of the 

 Pliocene. 



Professor Liversidge analysed a rock collected by Commodore 

 Goodenough from the shore below h.w.m. at Port Sandwich. 

 This appears to be a fine tuff, but details are not sufficiently 

 definite to warrant quotation. 



Santo is the largest island in the New Hebrides, and has the 

 following approximate dimensions : — Length, 75 miles; breadth, 

 30 miles; and area, 1500 sq. miles. 



