Detailed List of Specimens. 141 



Astell's Island, north-east of Inglis's Isle. Very fine- 

 grained grayish-white quartzose sandstone ;— identical with 

 that of Mallison's Island, and very closely resembling some of 

 the specimens from Prince Regent's and Hunter's Rivers. 



Among the remaining islands of this range, — Bosanoujet's, 

 Cotton's, and Pobassoo's Isles, were found by Mr. Brown to 

 consist, in a great measure, of sand-stone, of the same charac- 

 ter with the specimens above-mentioned. 



Pobassoo's Island, a small islet south-east of Astell's Isle. 

 — Fine-grained, somewhat reddish sandstone. Another spe- 

 cimen of sand-stone is friable, of a light flesh-red colour, and 

 apparently composed of the debris of granite. A crystalline 

 rock, consisting of greenish-gray hornblende, with a very small 

 proportion of felspar [Hornblende rock?).— Fragment, appa- 

 rently from a columnar mass, of a stone intermediate between 

 clink-stone and compact felspar. 



Such of the English Company's Islands as were examined 

 by Captain Flinders, are stated by him to consist, in the up- 

 per part, of a grit, or sand-stone, of a close texture ; the lower 

 part being argillaceous, and stratified, and " separating into 

 pieces of a reddish colour, resembling flat tiles." The strata- 

 dip to the west, at an angle of about 15°. 



South-west bay of Goulburn's south Island, two hun- 

 dred and fifty miles west of the Gulf of Carpentaria, (Narra- 

 tive, i. p. 64.) — Coarse-grained reddish quartzose conglomerate 

 and sandstone; resembling the older sand-stones of England 

 and Wales, and especially the " mill-stone grit " beneath the 

 coal formation. Fine grayish- white pipe-clay; of which about 

 thirty feet in thickness were visible, apparently above the sand- 

 stone last mentioned. Coarse-grained ferruginous sandstone, 

 containing fragments of quartz, from above the pipe-clay. — The 

 appearance of the cliff from which these specimens were taken, 

 is represented in the view of the bay on the south of Goul- 

 burn Island, (vol. i. p. 66) ; and a distant head in the view 

 consists of the same materials. 



Simms's Island, on the west of Goulburn's south Island, 

 (Narrative, i. p. 70) — is composed of a reddish conglomerate, 

 nearly identical with some of the specimens above mentioned. 



The western side of Lethbridge Bay, on the north of 

 Melville Island, consists of a range of cliffs like those at 

 Goulburn's Island ; the upper part being red, the lower white 

 and composed of pipe-clay. The western extremity of Ba- 

 thurst Island, between Cape Helvetius and Cape Four- 

 croy, is also formed of cliffs of a very dark red colour. 



Lacrosse Island, at the mouth of Cambridge Gulf, about 

 one hundred miles from Port Keats. — Reddish, very quartzose 



sand- 



