145 



Section o£ strata traversed in bore put down by Mr. A. Mac- 

 farlane on Section 302, Hundred o£ Malcolm, distant about 

 four miles from the lake. Surface at tlie level of high floods. 



Feet. 



1. Black alluvium... ... 3 Intensely salt water. 



2. Yellow calciferous sand o3 Water saline and very bitter. 



A few Middle Murravian 



3. Red clayey sand ... 47 fossils. 



4. Blue clay, tlie lower few No water. 



feet with fragments of 

 iron pyrites and pyri- 

 tous slaty rock more 

 or less micaceous ... 64 



Total 167 



The bore section may be regarded as a continuation of the 

 foregoing cliff sections ; the combined sections giving a total 

 thickness of 190 feet of Miocene strata. 



% 



Silurian Fossils fro:m the Parara Li:mestone, near 

 Ardrossan, collected by Mr. Tepper. 

 (1) Species of Stropliomena, in shape like S. sinriferoides^ 

 McCoy, but an inch in breadth, with concentric undulating 

 ridges, and without radial striae. (2) Head of a trilobite, 

 apparently of the same species as previously found, but of a 

 very much larger size, and showing details not observed in the 

 other examples. The glabella is an inch and a quarter long, 

 and three-quarters wide, with three pairs of oblique furrows ; 

 its surface is ornamented with numerous closely-set granules. 



Notes on the Physical and Gteological Features about 

 Lake Eyre. Communicated by Mr. Gr. L. Debney. 



The country in the neighbourhood of Lake Eyre and within 

 a radius of fifty or sixty miles on the eastern and northern 

 sides consists of large tracts of sandhill-country skirted with 

 stony plains, which are intersected by stony ridges and table 

 hills. These table lands and ridges appear to have once formed 

 part of an elevated undulating plateau. They are covered with 

 large masses of flint rocks, of reddish hue, now worn into such 

 irregular masses that the stratification is not discernible. The 

 plains are strewn with small waterworn debris of the same rock, 

 and the abrupt sides of the hills with angular broken pieces, 

 which gradually become more waterworn and smaller on des- 

 cending to the plain. 



These table lands and hills are mostly composed of sand- 



