576 Notes on Dehli Point, Pulo-Tinghie, fyc. [Sept. 



eighteen inches in thickness, of which No. 6 is a specimen. Indu- 

 rated clayslate, No. 9, is likewise seen in layers running parallel, and 

 in juxta-position to Nos. 1 and 2, of a few inches in breadth. Quartz 

 was found, No. 5, in layers from one to two inches in thickness, 

 accompanying the others and occasionally crossing them, and again 

 continuing its course : imbedded masses of siliceous matter occurred 

 both in the scoria and in the strata. A nucleus, five or six feet in 

 diameter, was examined, which presented the appearance as if lava 

 in a liquid form had been forced up from below, with a gyrating 

 motion ; circular layers having different shades of colour becoming 

 wider and more extended, and were found edging away into straight 

 lines parallel to the other strata. Of the tube marked No. 2, many 

 were found from half an inch to two inches diameter ; whilst No. 3 

 was got at the outer edge of the stratification. Of the remarkable 

 specimen No. 10, abundance were seen, always standing up an edge : 

 above the general level, and occasionally many feet in length, a piece 

 might be found large enough to furnish forth the reticulations of a 

 good-sized Gothic window. 



At the N.E. point of the reef, within a few yards of the sandy 

 beach, and dry at low water, was found a fossil tree, of which No. 

 11 is a specimen, standing at least 15 feet high and of considerable 

 diameter, attached to a mass of rock of the same kind, and so good 

 was the resemblance to a decayed tree, that some of the seamen 

 called out, ' Come and see a tree grilled into stone by the heat.' The 

 fossil in question must have been in a decayed state previous to its 

 exposui'e to the mineralizing process, and it is the more remarkable, 

 as it now stands, to all appearance, as it originally stood when alive : — 

 it is the same as No. 9, composed of argillaceous schist. A specimen 

 of coral No. 7, which has been exposed to the same general igneous 

 agency as the masses scattered around, and found in the masses 

 themselves, Madrepore No. 8, but the whole of the reef has coral of 

 recent growth scattered over it, in all states and ages. Our stay on 

 this point only extended to a few hours : little opportunity was given 

 for minute observation, but it is a field well worthy the attention of 

 future travellers in that quarter. 



Pulo-Tinghie will be found in the charts to the northward and east- 

 ward of Delhi Point : this island rises to a considerable altitude, and 

 terminates in a graceful truncated cone, with a lower cone seen to the 

 southward of the former. The general surface presents irregular ridges 

 radiating from the cone as a centre, running down to the circumfer- 

 ence, i. e. the water's edge, which disposition of surface often obtains 

 in volcanic islands. Be this, however, as it may ; we found Pulo- 



