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fimble -above iffy but there is alfo a dampnefs, fo that I was 
forc'd to put two Blankets betwixt me and the bottom, whileft 
I had never an one to cover me a top. 
6. Although I was fo weak with the parefis after a Bilions co- 
Ikk^as not to have the ufe of my handstand as little of my legs ; 
yet at the Caymans, daring an hour or two's ftay there, I examin'd 
that affertionof Mx.Lygms^ that a Tortoife hath three Hearts, 
and I found it falfe. For, although the refemblance of the two 
auricles be fuch, as alfo their bodies or flefli, as to deceive the un- 
wary obferver y yet is there but one Heart, triangular, and fle<hy 5 
the other two. are only the auricles r, yet of the fame ftape and bo- 
dy. The two auricles move n a feveral time from the Heart, 
and they are diftane'd from the Heart about an inch 5 and the 
paflage flefhy ( as I remember) and narrow, by which the bloud 
is infus'd into the heart. This Heart hath but one Ventricle 5 yet 
are there feveral columns of flefli ^nd receptacles in it, fuch as 
are not in the auricles. I was not able to examine the way, how 
the Bloud circulates* through the Lungs in that Animal > nor 
the ufe of its Lungs, which is not ob refrigerwm. Had I ever 
had my health perfedly, I intended to have made a voyage to 
the Caymans on puupofe, to contemplate the Generation of Tor- 
uifes and Crocodiles there, their partS;, and the manner how their 
Eggs are hatch'd and I ihould thence have given you an ac- 
count of jnany wonderful things. The Graffeof the Sub-ma- 
rine Meadows is not a fpan long, that I could obferve, and: is of a 
green approching to yellow. They bite much more then they 
fwalhw^to that the Sea is cover- d with the Grafs, where they 
feed at the bottom. Once in about halfe an hour they come 
up, and fetch one breath like a figh, and then fink down again. 
And if out of the water, they breath fomewhat oftner. If you 
hurt them on ihore, as they lie on their backs, .the teares will 
trickle from their Eyes. You may keep them out of the water 
2Qdayes and more, and yet they will be fo fat as to be fitting 
meat, provided you give them twice a day about halfe a pint of 
Salt- water, A The Fat that is about their Guts, is yellow* though 
that of the Body be gretm The Head being cue off, dies in- 
ftantly : and if you take out the Heart, the motion continues not 
lopg, But any quantity of the flefli will move, if pricked, and 
