35 



at Paskeville, sent me a collection of stones for determination, 

 gathered from the locality, among which wa6 one of a similar 

 vesicular structure. Still more recently Mr. A. N. Mackenzie 

 sent down from Cooper Creek to the Adelaide Museum a 

 large mass of fused earth, half a square yard in extent, 

 which possessed the same characteristics as those obtained 

 from the Findon gravel pits, but it possesses a more open 

 texture and will float in water. The specimen was obtained 

 at Kopperamanna Lake, in the Cooper Creek region. 



DESCRIPTION OF PLATES. 



Plate V. 



Photograph of a group of small ''atoll"-like circles formed by 

 Scrpulae, Encounter Bay, South Australia. 



Plate VI. 



View of a group of large transported stones, set in alluvium. 

 Mr. Baulderstone's paddock, near Fullarton Road, looking north. 



Plate VII. 

 View of another group, in linear position, looking east. 

 Observe the numerous assemblage of somewhat smaller stones that 

 have been dragged to the boundary fence in middle distance. Mr. 

 Baulderstone's paddock, near Fullarton Road. 



Note. — The photographs, now reproduced, were taken before 

 the planting of the ground as an orchard. 



