2 60 Of Animal Bodies petrify d. Part HI. 
yet feen any Jhell. The top is blunt, and of a middle height. 
Encompafled with five double pricked Rows, all meeting 
in the fore part of the Belly. The fpaces betwixt which, 
are cancellated much after the manner of the Sea-Tor toife- 
Jhell. Tis a perfect Flint, brown without, and whitifh 
within. 
ANOTHER of the fame fort , with bigger pointed 
Rows. 
A THIRD, of the fame Figure, but foft,/<\ of a kind of 
Limy fubflance, or that of Gyfftim. 
The SHARP CONICK HELMET-STONE. Tis a 
Semipellucid Flint. Surrounded with five double pointed 
Rows, meeting not only on the top, but alfo at the centre 
of the Bafe or Belly. Befler figures a fmall Conic kHelmet, 
by the name of Echinites : a great one, by that of Scolo- 
pendrites. And feveral Species hereof are alfo figured by Al- 
(a) Muf. Me- drovandus. (a) None of the flinty or other hard Helmet 
Stones make any ebullition with Acids. 
The HELIX or Stone Nautilus $ as from its Figure it 
may not improperly be nam'd. Comu Ammoym $ From 
Jupiter A?nmon , picltur' d with Horns. Here are feveral 
of them, both in fize, fhape, and fubftance diftincl:. I 
find no Author defcribing them much broader than the 
ball of a mans hand. The higher!: Boetius reckons, about 
three pounds in weight. But in this Mufaum there is one 
near two yards in circumference, and proportionably 
thick. Of an A(h-colour,and fomewhat gritty fubftance.The 
feveral Rounds,as it were,carved with oblique waves. Given 
by the Right Honourable Henry Duke of Norfolk, With, 
ANOTHER GREAT CORNU AMMONIS almoft 
as big, fc . about five feet round about. 
A SMALL CORNU AMMONIS, of an afhen colour, 
and foftifli fubftance: yet cMbluble only with Nitrous 
Acids. It maketh but one or two Rounds 5 ratably, far 
more fwelling, than in the other kinds. 
ANOTHER, of a foft and whitiih fubftance 3 diitbluble 
in any Acid, and confiding of feveral Rounds. 
A THIRD, growing upon a Stone of a like fubflance. 
Figurd in Calceolarias Mufceum, and that of Olearius^ in 
both under the Name of a Petrify 'd Serpent. 
The CASED CORNU AMMONIS. The outer part 
i if.. * of 
