169 
TAB. CCLXXXIV. 
CALX _ carbonata, var. foetida. 
Fetid Carbonate of Lime, spherical and 
concentrated. 
Div. 2. Imitative. 
— eer 
Axtuouen this substance has been twice figured before, 
the present specimen is so remarkably curious as to its 
formation that it must excite astonishment, and I have 
found that the best description must fall short of giving a 
proper idea of it without the specimen ora figure. At first 
it seems a wonder that the spherical ball should be formed 
so regularly as in this, or so aggregated as in fab. 19 ; but 
the somewhat stratified concentric rings, with a sort of coat 
or covering, (as a formation of stone,) are at present un- 
accounted for in a satisfactory manner, any more than 
tab. 38, to which, however, some affinity may be traced. 
But as the formation is more external, and the inside partly 
crystallized, although somewhat confusedly, it is still more 
unaccountable. I broke one on purpose to see how it ap- 
peared withinside, expecting a section would either show a 
continuation of the concentric rings, either in striz, or 
casing like an onion, or that I should be led directly to the 
manner of its formation; but as it does not show what 
was, or might have been, expected, it may be somewhat 
satisfactory if I try to account for it, although it may ap- 
pear a little too theoretical. 
On examining the broken one, there are some signs of a 
