242 Of the Muscle. 
great Head, two Horns like a Snail's, and 
fix or eight whitifh Feet: hut thefe fhined 
not. 
As the Bodies of Lobders and fome 
other Kinds of Fifhes, tainted Flefh, rotten 
Wood, and other Subdances, are fometimes 
found to fhine with a Light refembling the 
foregoing, may it not probably proceed from 
the fame Caufe, namely, from Animalcules ?■ 
Some have alfo fuppofed, that the Ignis Fa- 
ililts , Will-in-a-WiJp, or Jack-a-Lanthorn , 
is nothing elfe but a Swarm of minute flying 
Infedts, that emit Light around them in the 
Manner Glow-worms do : and, indeed, the 
Motions and feveral other Circumdances of 
this Sort of Fire (if I may fo term it) feem 
favourable to fuch Opinion. 
The Curious will judge it proper to ex¬ 
amine this Matter carefully, and to them it 
is fubmitted. 
CHAP. XLIII. 
Of the Muscle. 
I Have obferved already, in the 127th Page 
of this Treatife, that a Mufcle is a mod: 
delightful Object for the Microfcope and 
that, in the tranfparent Membrane which 
immediately appears on opening of the Shell, 
the 
