45^ Dr. Camper’s ConjeSiures relative to the 
bones, and of birds but very few, have been hitherto found in 
a petrified ftate, and belonging to the old world. 
Klein Lanknm, near Franeker,. 
jnn@ i8,‘ 178 6. 
PETRUS CAMPER. 
EXPLANATION OF THE PLATES. 
TAB. XV. 
Fig. 1, 2. Are vertebrae taken from the Ikeleton of the cro- 
codile defcribed by Dr. Neh. Grew, in his Catalogue of the 
Natural Rarities at Grefham College, p. 42. and p. 43. 
a , h. c 9 f <J, the bodies of the vertebrae ; a, b of the 
fourth ; c, f of the firft vertebra of the neck ; /3, z, /. and 
x 9 y 9 w. the fpinous procefles ; y /3. and s . the afcending ; 
/, and u v. the defcending procefles ; g , h 9 r, /. d> e 9 n y p 9 o 9 q . 
the tranfverfe, united by cartilages to the bodies of the verte- 
brae.. Grew calls them ojfa mucronata. The tranverfe pre- 
cedes of the fourth vertebra being loft, the roots of the mucro- 
nated procefles are very evident at g h 9 i k . 
On the under part of thefe vertebrae are (/ and m) procefles, 
fimilar to thofe we find in the vertebrae of the neck in turtles 
and birds. Not only the fix pofterior but the five anterior ver- 
tebrae of the back are provided with fuch procefles ; of thefe, 
however, Dr. Grew makes no mention. 
% 
Fig. 
