MUKEAT — wallabies' HOLES IN AUSTRALIA. 
63 
rORAMINIFEEA. 
Nuramulina 
scabra. 
Numniulina 
variolaria. 
Miliola (Trilo- 
culina). 
Nummuliua 
laevigata. 
N. scabra. 
N. variolaria. 
Guttulina. 
N. laevigata. 
N. scabra. 
N. variolaria. 
Miliola (Qiiin- 
queloculina). 
Guttulina. 
Rotalia obscura 
(aud others). 
Lignite. 
Pyrites. 
Pyrites, 
Lignite. 
Pyrites. 
Should one wish to take in hand the examination of a series of the 
tertiary strata of any part of the Isle of Wight basin, in the manner 
above suggested, well assorted samples, collected and labelled with 
care, can be readily obtained of Henry Keeping, of Freshwater, who 
is an intelligent and trustworthy collector, and whose charges are 
moderate. 
THE OCCUEEENCE OF A PECULIAE SUBSTANCE 
IN THE LIMESTONE OF SOUTH AUSTEALIA. 
By W. Murray, Esq., C.E. 
Taking a section across the Murray Eiver Valley, in South Austra- 
lia, for a distance of about forty miles from west to east, we have (as 
shown in the accompanying diagram) two parallel ranges, and on the 
Fig. 1. 
outer flank of the western range there are at some places micaceous 
strata (a), having a steep inclination, resting against the contorted 
strata of the range, sections of which are seen in gaps and gullies, 
with steep sides, in some instances 800 to 1000 feet deep. These 
