[172] 
comes often to be broke off, the Trunk of it ftill remain- 
ing in the skin. When new matter is lupplyed, another 
hair grows by the fide of the former, that was broken j 
and this fo often till there comes fometimesto be 8./ 0.20. 
or 3 in a bundle. Yet this number is not made up in 
I. or 2. years, but probably in a great many. 
The reafon of this my conclufion, is grounded upon 
the bluntnefs of the tops of all the hairs found in thefe 
worms, whereas all the other hairs growing upon the face 
are fliarp-pointed,till fuch time as they come to be broken. 
In the year i<$74. I writ to Mr. Oldenburg that I found 
the Cuticula, or uppermoft skin of a body to confift^of 
round Particles or Scales: I alfo gave him my Opinion, 
how this skin was made, and how the upper part ot it was 
worn oiF, and the under part came to fucceed in its placcv 
Since that time there was little difference in what I ob- 
ferved, until now of late, that I have madeufeof ano- 
ther way. For at firft I faw by a common Microfcope 
the parts of the Scales appearing to the Eye as they were 
round, lying clofe in order, and fo fmall that a fand 
would cover 200, or 2/0, of them, as is here fhewn in Fig. 
But examining them fince, by a Glafs which mag- 
nified more, I am fatisfied that they are not made out of 
the groffer part of the moifture or fubftance which is eva- 
porated our of the body, as I formerly thought, but are 
meer Scales, fuch as grow upon the outward skin of a 
fifh, and are called fifh-fcales. 
Thefe Scales lye upon our body, juft as they do upon 
fifties, the moft part of them are quinque-lateral ^ 
the figure of a whole one is here ftiewn by a magnifying 
Glafs ati(. the fide 6?. P. was faft'ned to the sliin, and is 
not fo broad as if it be meafured higher. Some of the 
Scales were not fo long as K^ , and fome had not the fides 
fo even, but thefe laft I took to be pulled off the body be- 
fore they were fully grpwn. They are very thin, for I 
judge their bredth is above ay times more than their thick- 
