397 
Since writing the above note the occurrence of Byramidella jonesiana was 
noted, which adds a Kalimnan feature to this fauna at 450 feet. 
Fossils at about 450 feet— 
Bathyactis lens, Duncan sp. 
CeUepora sp. 
Leda huttoni, T. Woods. 
,, woodsi, Tate. 
Bentalium aratum, Tate. 
Pyramidella jonesiana, Tate sp. 
Nassa tatei, T. Woods. 
Fossils at 800 feet— 
Polyzoal rock, containing— 
Borina gracilis, M. Edw. sp. 
Entalophora, sp. 
Retepora sp. 
Cellepora sp. 
From information derived by an inspection of the engineer’s report of 
the boring I find that at Yatpool the base of the Janjukian at about 842 feet 
rests on brown clay. The top of the Janjukian appears to be reached at 557 
feet, whilst the top of the succeeding fossiliferous beds, the Kalimnan, are 
touched at about 329 feet. Thus the Kalimnan may be 228 feet thick, and the 
Janjukian 285 feet. These numbers are to be taken as provisional since no 
fossils were examined beyond those indicated above. 
Notes on the foregoing Bores. 
From Maryvale to Yatpool the bores shown as above are roughly speaking 
in a line north 20° east. Although the evidence of some of these bores is 
very imperfect, yet on the whole the following interesting data may be 
gleaned. 1 Viewed against the line of reduced levels, the ground-surface 
from Maryvale gradually slopes from 532 feet to 162 feet at Yatpool. From 
Maryvale to Netherby the Kalimnan beds run at almost equal depths below 
the surface, about 150 to 200 feet below ground level. Thence to Yatpool 
there is a slightly steeper slope, at the latter locality the Kalimnan coming in 
at 325 feet below the ground surface. 
Mt. Gnarr. Malice Bore, No. 16. 
This series has not yet been examined in detail, but the following notes 
are given as of preliminary importance. 
The superficial deposits are yellow and ochreous sands and stiff clays. 
At 160 feet a coarse quartz grit occurs. 
Shelly Kalimnan clays are seen at 340 feet. 
The polyzoal rock series occurs about 470 feet. At 730 to 740 feet there 
is a whitish, marly rock, full of vesicles. The sample of 740 to 750 feet is 
a dark, basaltic-looking rock, and similarly vesicular. Wishing for an 
independent opinion on this rock I placed a specimen in the hands of Mr. 
D. J. Mahony, M.Sc., Petrologist to the Geological Survey, and he 
kindly favoured me with the following note :—“ I found that the material 
easily breaks down in water, unlike decomposed basalt, so washed off 
the finer parts and mounted the residue on the slide sent herewith. 
This residue consists largely of quartz, with some ferro-magnesian 
minerals and organic remains, including foraminifera, so that there can 
be little doubt that the material is part of an aqueous deposit, and 
that the vesicular, bread-like structure is due to some peculiar conditions 
prevailing during its deposition—possibly the formation of gas bubbles.” 
1. See fig. 42, p. 408. 
