C 403 ] 
animal ; and in others no part adheres to the flate, 
but the fkeleton, or part of it, moft commonly the 
fpine. He fays that he always obferved, that the 
bones are never feen but upon the grey or blue flate, 
or their impreflionsi and that the fcales or fkin are to 
be found only upon the black ftone or flate ; which 
makes him conjedture, that fomething erofive in the 
grey flate deftroys every part but the bony fyflem ; but 
that the black, being of a more foft and undtuous na- 
ture, preferves the fcales, and often the very fkin. This, 
however, muft bereferred to further obfervation. 
TAB. XV. 
1 
Fig. I,. 3. Thefe two bodies feem to be figs, petrified 
when hard and green ; being, as I have juft 
obferved, then capable of receiving the py- 
ritical particles, with which they are mani- 
feftly impregnated. One is more perfedt in 
its form than the other ; and they are now 
fhooting their falts, and will foon fall to 
pieces. 
Fig. 2. appears to be a Myrobalan, diftinguifhed 
from the other fpecies of that name by its 
round figure ; and is called the belleric 
Myrobalan. It is nearly deftroyed by the 
pyritical matter, and will not long remain 
whole. 
Fig. 4. feems to be a fpecies of Phafeolus, one of 
thofe efpecially diftinguifhed by the fruits. 
FruBibus Jplendentibus nigris. 
Fig. 5- Another Phafeolus. 
Fig. 7, Another. SwFig. 4. 
Fff 2 
Fig. 8. 
