PetrifaZlions found in St. Peter’s Mountain . , 44 j 
known to me, and not at all analogous to the vertebrae of the 
crocodile, defcribed and reprefented by Dr. N. Grew. 
§ 4. As I intended to vifit London in 1785, I flattered 
myfelf I fhould ftill find the fkeleton of the great crocodile 
formerly at Grefham College, and be able to find out fuch 
eharadteriftic diftindtions as fliould be neceflary to decide the 
queftion. Dr. Gray was fo kind as to go with me to the 
lower apartments of the Britifh Mufeum, where we found* 
though not without difficulty, the fkeleton much negledled* 
fpoiled, and deprived of feveral interefting parts. I admired, 
neverthelefs, the remainder of it, being infinitely pleafed with 
the tranfverfe futures, tab. XV. fig. 1, 2. a r b . c r f S*. £7 by 
which not only thofe of the neck and thorax, but thofe of 
the loins alfo, are divided, and which I made a drawing of, as 
large as the life, the 20th of Odtober, 17.85, of which fig. u 
and 2. are very accurate copies. 
I confefs I had not obferved that particular divifion or future 
in the fkeleton of a fmall crocodile, of thirteen inches, made 
by my youngeft fom; but after being apprized of it by the 
large fkeleton in the Mufeum, of twelve feet four inches, 
Paris meafure, on looking at my own when I returned 
home, I found them both alike, and that thofe parts were not 
epiphyfes ; of which, however, the tranfverfe proceffes of the 
neck. fig. I. d r e , q 9 0 , n r p 9 have all the appearance, though 
there is no other epiphyfis to be obferved in the reft of the 
bones of that large fkeleton. 
When we compare the foffil vertebra, fig. 5. with thofe now 
in the Mufeum, we fhall find the epiphyfes AB, CD, analo- 
gous to a , b 9 c 9 d 9 fig. 4. being the real epiphyfes in the ver- 
tebra of a. young porpoife. 
1 procured. 
