448 Dr. Camper’s Conjectures relative to the 
I procured, in London, the largeft vertebrae of the neck of 
a turtle I could get, and prepared two of them as in fig, 3. in 
which, as along the back of that Angular creature, I found the 
tranfverfe divifions a 9 c 9 d 9 f : of all which 1 have not feen a 
Angle inftance amongft the dorfal fpinae from St. Peter’s moun- 
tain, one of which conAfts of feven, another of twelve, and a 
third of fourteen vertebrae. Some of the vertebrae have, I 
acknowledge, an inferior procefs, as in the crocodile, /, tn r 
Ag. 1. Of thefe I have fent likewife two to the Mufeum. 
The oftrich, and the turtle Mydas , have fuch procefles, but 
no quadruped I know of. 
The articulation of the vertebrae with each other, by the 
furfaces of the bodies themfelves, is intirely different, not only 
from that of the crocodile, but from that of all the cetaceous 
Afhes I have ever feen : and I dare venture to affert, I have 
feen a great many, excluAve of thofe in my colle&ion. The 
anterior part of the Maeftricht vertebrae is more or lefs trian- 
gular and hollow, as in Ag. 5. C, D, L. Thepofterior AB is 
convex. Both thefe furfaces are very fraooth, as if they had 
been covered with a very thin cartilage, and moved one upon 
the other, without being united by an elaftie lamella, as in all 
quadrupeds and cetaceous Allies ; in which the vertebrae have on 
both the furfaces a round brim, or circular edge, a>h 9 /, b 9 by 
means of which the ligaments are connefted, and a flat hollow 
furface within, as b 9 /, Ag. 4. for the elaftie pulp that is between 
them. 
§ 5. The dentition is fo Angular in thefe foffil jaw-bones 
that it deferyes a particular defeription. In all quadrupeds, as 
in man, the teeth which appear Arft are all Ihed at a certain 
period of life, and in the mean time new ones are formed 
gbove, under, or at the Ades of the primordial or temporary 
3 teeth, 
