Thei'e Worms are indofed in a Shell, which is grayifh, and of the bignefl 
of a Barly-corn, (harper at one end, than the other. By the means of an 
excellent Mi cr of cop I have obferv’d , that ’tis all overfpread with little 
Stones, and little greenifti Eggs 5 and that there is at the fharpeft end a 
little hole, by which thefe Creatures calf out their excrement , and at the 
other end , a fomewhat bigger whole , through which they put out their 
heads, and fatten. themfelves. to the Stones, they gnaw. They are not fo 
four up, but that fometimes they come out, and walk abroad. They are alL 
black, about two Lims of an Inf h long, and three quarters of a Line large. 
Their Body is diftinguifh’t into feveral plyes* and near their head they have 
three feet on each fide, which have but two Joints, relembling thofe of- a 
Lowfe. When they move, their Body is commonly upwards, with their 
mouth again!! the Stone, They have a big head, fomewhat flat , and even, 
of the colour of a Tor toife- Shell , brauniftt , withfomefmall white hair. 
Their mouth is alfo big; where may be feen four kinds of Jaw-bones, lying 
croffewife, which they move continually, opening and (hutting them like a 
pair of Compajfes with four branches. The Jaws on both fides of the month 
are all black the nether- Jaw hath a point like the Sting, of a Bee, but uni- 
form, . They draw threds our of their mouth with their fore- feet, ufing 
that point to range them j and to form their Shells of them. They have Ten 
Eyes, very black and round, which. appear to be bigger than a Pins- head. 
There are five of them on each fide of the head, flan ding after this manner 
O' o. 
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But betides thefe Worms, I have found; that Mortar is eaten by an infinit 
number of fmall Creatures, of the bignefs of Cheefe-Mites. Thefe have but 
two Eyes, and are blackifh, They have four feet on each fide pretty long. 
The point of their Muzzel is very (harp, asthat ©fa Spider; 1 fend you but 
one of them, though I had abundance, but they are dead and loft. It may 
be, you 1 find fome at { P<?w, feeing that in the old Mortar betwixt Stones, 
that is found in Walls made with rubbifb, there is great ftore of them , toge- 
ther with great plenty of their little Eggs*. I have not yet examined , whe- 
ther thefe be thofe, that in the furfaces of all the Stones , where they are 
met , with, make little round holes, and fmall traces andimpteiTions, which 
make them look like Worm-eaten Wood. But ’tis probable, they are fuch. It 
fhould be obferved,. whether thefe Worms do not take Wings , and all' the 
other appearances of Cater-pillars • and whether they are not to be found 
in Plaifter, that is full of holes, in Bricks, in Greety Stones, and in Rocks, 
You may obferve more of them rin Walls expofed to the South, than in 
others | and that the Worms, that eat the Stone, live longer, than thofe, 
i ' } v that 
