[ 602* ] 
ken off at the Death of the Animal, before its being 
petrified. 
Mr. Brovcn does not mention in his Infect the 
Property of rolling itfelf up, which this certainly 
had; as appears by fcveral of the Figures, as Fig. 3, 
4, y, 7, 11, and 12, which are intirely rolled up; 
and as is more particularly reprefented by Fig 1 1 and 
12. in which it appears, that the Tail is turn’d up 
under the Belly quite to the Mouth ; and at Fig. 8. the 
Creature feems but half-rolled up. 
I have confulted all the Books I could meet with, 
which give Figures of Infefts and cruftaceous Ani- 
mals in their natural and petrified States; and find 
none refemb’e this Dudley Foil'll fo near as M. 
Klein's Inletfr; therefore I fhall, till we get more 
Information, call it, Scolopendr £ aquatic £ Jcutat # 
affine animal petrifallum. 
XVI. ! The Defcription and Figures of a / 'mall 
flat fpheroklal Stone, having Fines jormed 
upon it ; by C. Mortimer, M. D. & Secret. 
R. S. 
M R. Deter Collin fon , a very worthy Member 
of the Royal Soc ety, produced, at a Meeting 
of that Body, on Nov. 8/1750. a very curious fphe- 
roidal Stone, about 4 Inches Diameter, of a Cho- 
colate-colour, marked with 4 white Lines, about 
the Breadth of a Horfe-hair, encompafling the 
whole Stone, like the Meridians on a Globe; bur, 
inftead of eroding one another in a Point, as they 
do, upon the Globe, thefe are connected by a fhort 
tranfvcrlc Line j as is deferibed above in p. 535 of 
