[ 36 1 
line thick, Wronger and larger above, and terminating 
below like a ligature, filled with a matter like that 
contained in the inteffines of fifties and infedts. This 
may be what gave occafion to Pliny, and other na- 
turalifls, to think, that thefe infers, finding them- 
felves taken, throw out their bowels in order to lefTen 
their bulk. . > • 
It is very likely, that this gland, which it pufties 
out, and thefe kinds of bowels full of the lame 
matter, which fills them within, which in the 
natural flate of the infedt do not at all appear, but 
are in the infide of the animal, without any figns of 
their exigence, being pufhed outwards, increafe the 
lize of its head to ten times its common bulk ; and 
are the inteffines, which he throws out at times. Is 
not the gland his flomach, and thefe prepuces his 
.ruts, which he protrudes and retradfs at pleafure ?* 
To what purpofe this play or adtion of thefe parts ? 
I profefs I do not know. It cannot be to difengage 
himfelf from the machine ; and this muff be very 
final}, in order to be enabled to catch thefe infedfs. 
If it was of glafs, and of a bell-form, the protrufion 
of the flomach might be feen, in order to ejedt that 
matter, whatfoever it be, in this play or adtion ; 
which may perhaps be hereafter difeovered. 
The body of the animal is fquare ; and the four 
fides are armed with fuch prickles, as I never faw 
before. Alfo every ring has four bundles of prickles.. 
The following is the manner of their being dilpofed : 
At the end of each ring, above the fquare, on each 
fide, we fee a gland, near which a bundle of prickles 
arifes towards the fquares below. This bundle feems 
to fill the whole ring, and to part as it were from the 
center 
