PetrifaSlions found in St. Peter’s Mountain . 453 
Fig. 2. Reprefents the feventh vertebra of the back ; A, 
and C. are the afcending and defcending procefles, forming 
the articulations with the adjacent vertebrae ; B. the tranf- 
verfe procefs, to which is united the rib FB. in B. ; 
DE. the fpinous procefs; H, H, I. the body of the fame ver- 
tebra. 
Thefe figures are as large as the life, and made from the 
fame Ikeleton, now in the Britifh Mufeum. The whole length 
is equal to 12-} feet, Paris meafure ; the head equal to 2 feet ; 
the neck equal to 1 foot the trunk equal to 3 feet 8 inches ; the 
tail equal to 5 feet 8 inches. The meafurement given by Dr. 
Grew does not agree with mine; but he feems not to have 
taken it with great attention (p. 42.), for he makes ufe of the 
words about , ahnof , &c. 
Observation. What ftruck me was, the tranfverfe future, 
b. c , f. which divided the bodies of all the vertebrae of 
the neck, back, and loins. This divifion ended with the os 
facrum, which was intire, as were alfo the vertebras of the tail. 
Dr. Grew feems only to haven taken notice of the futures be- 
longing to the tranfverle procefles. 
I have a fmall Ikeleton of a crocodile equal to 13 inches, in 
which the 7 vertebrae of the neck, 1 2 of the back, and the 
5 of the loins, are divided in the fame manner as in the large 
Ikeleton in the Britifh Mufeum, Thofe of the os facrum 
and tail are without, and have no mu k of an epiphyfis. 
Conclusion. The tranfverfe divifion of the vertebrae above** 
mentioned is alfo peculiar to this animal ; and there is no 
epiphyfis, as in other animals. 
To be fure of this, I dilfeded and made a Ikeleton of the 
.Lacerta Iguana, Linn. fp. 26. perfedly well, defcribed by 
N ix n % Marc® 
