Royal Society. 5 
the faid perforated piece of leather, and a double bladder, and 
let down 50 fathoms, but it came up again entire 5 but upon fink- 
ing it 75 fathoms, it then came up broken, and the bottle full of 
watery in 39 f degrees of latitude, and about 150 leagues weft- 
ward of ^Portugali a Florence flails was well flopped with a blad- 
der over its mouth, and let down 30 fathom, but it was taken up 
broken. 
The Lumbricus Hydropicus; hy 'Dr. Edw. Tyfon. Phil. 
Tranf. N° 193. p. 505. 
IN the diiGfedion of a gaze! la or antelope, Dr. I'yfon oblerved 
leveral Hydatides^ or fihus, filled with limpid water, about 
the bignefs of a pigeon's egg, and of an oval form, faftened to the 
Omentum^ and lome in the ^'Pelvis^ between the bladder of urine 
and the Re£ium ^ he had obferved the like watry bags or hyda- 
tides in other animals, and he lurpe6led them to be a particular 
fort of infed bred in animal bodies, or at leaf! the embrio's or 
eggs of them. i. Becaufe he oblerved them included in an exter- 
nal membrane, like a Matrh, fo loofely, that by opening it 
with the finger, or a knife, the internal bladder, containing the 
LympJ'Jci or Serum^ feemed no where to have any connection with 
it, but would very readily drop out, ftill retaining its liquor, 
without fpilling any of it. 2. He obferved, that this internal 
bladder had a neck, or white body, more opake than the reft of 
the bladder, and protuberant from it, with an orifice at- its extre- 
mity 3 by this it might, as by a mouth, ezchauft the Serum frora 
the external membrane, and fo fupply its bladder, or ftomach, 
5. Upon bringing this neck near the candle, it was found really 
to move, and then fhorten itlelf Fig. i . Plate 1. reprefents 
one of thefe watry bladders incloied in its external membrane, or 
Chorion 3 its ihape was alm.oft round, only flatted as a drop of 
quickiilver will be, by lying on a plane 3 a iliews the neck, \s^xi 
thro' tne membrane, which m Fig. 2. is more plainly repreiented 
(the external membrane being taken off) but as appearing to the 
nake'd eye ^ where we may obierve an open orifice at its extremity, 
and that it confifts of circular rings, or incifures, which ii\ 
Fig. 3. being viewed by a microfcope, do more evidently 
diicover themlelvesj this part is granulated with a number of fine 
eminences all over 3 the orifice at the extremity feems to be form.- 
ed by rctradling itlelf inwards 3 and upon trial it was found fo^ for 
in Fig. 4. is reprcfented the neck of this worm, drawn out its whole 
length, and magnified j where may be obferved the leHcTang of the 
lings, 
