260 
(a) Muf. Me- 
ullicum. 
Of Animal Bodies petrify d. Part III. 
vet feen any Jhell. The top is blunt, and of a middle height. 
Encompaffed with five double pricked Rows, all meeting 
in the fore part of the Belly. The fpaces betwixt which, 
arc cancellated much after the manner of the Sea-Tortoife- 
fhell. Tis a perfect Flint, brown without, and whitifh 
within. 
ANOTHER of tire fame fort, with bigger pointed 
Rows. 
A THIRD, of the fame Figure, but fo of a kind of 
Limy fubftance, or that of Gypfum. 
The SHARP CONICK HELMET-STONE. Tis a 
Semi pellucid Flint. Surrounded with five double pointed 
Rows, meeting not only on the top, but alfo at the centre 
of the Bafe or Belly. Bejler figures a fmall Conick. Helmet, 
by the name of Echinites: a great one, by that of Scolo- 
pendrites. And feveral Species hereof are alfo figur’d by Al- 
■ 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. Cornu Ammotm 5 From 
Jupiter Ammon , pictur’d with Horns. Here are feveral 
of them, both in fize, fhape, and fubftance diftinct. I 
find no Author defcribing them much broader than the 
ball of a mans hand. The higheft Boetius reckons, about 
three pounds in weight. But in this Mufaum there is one 
near two yards in circumference, and proportionably 
thick. Of an Afh-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 foftifh fubftance: yet diftbluble only with Nitrous 
Acids. It maketh but one or two Rounds 5 ratably, fat- 
more fwelling, than in the other kinds. 
ANOTHER, of a foft and whitifh fubftance ; diftbluble 
in any Acid, and confifting of feveral Rounds. 
A THIRD, growing upon a Stone of a like fubftance. 
Figur’d in Calceolarias'Mufueum, and that of Olearius 5 in 
both under the Name of a Petrify d Serpent. 
The CASED CORNU AMMONIS. The outer part 
of 
