[372] 
Thefe extenfions of an Artery by Galen, and all others, are 
called Aneurijmata j as thofe of a Vein, Varices; and are 
reputed to happen, when the inward Coat of the Artery is 
burften and fo gives way for the extenfion of the outward,- 
and commonly they have been occafioned by pricking an 
Artery, they have defigned a Vein, But what fhould be 
the caufe of itjn our fubjeiSt,is moft difficult to affigne. For, 
It being the only oneof thekind Ihavediflededs I know 
nothowfar it msLYhtpr^eternatural, or whither in others 
the fame be to be met with again. If preternatural, 'tis the 
more remarkable it ftiould happenhere; becaufe this is the 
ftrongeftjand th'ickc&Artery in the whole body. If natural, 
there is nothing I can at prefent better paralel it with^then 
thofe protuberant fwellings in thtAortaoiSili^ormes, and 
other luch Infers, which Malpi^hi takes forfo many feveral 
hearts. Which muft be allowed him, unlefs we will deny 
them to have any heart at all. Which pofTibly it may. For 
in a L^^r^, ^ there are two large ^r^mW, without any of 
thefe fwellings ; fo we muft either confefs them, to be two 
hearts; or not to have any; for there is no part yet I 
have obferved in them, that I can give that name to, be- 
fides,- nor to thefe too, without fome allowance. 
* As to the other parts, we have but little to fay ; for 
want of time, we had not leafure to examine thei?r^/;^. 
The Aperture of the Eye wasbutfmall, as in the//(?j^- 
kind. The membrana niilitans. Plainer, then ufually in 
Quadrupeds ; which might be convenient, lince wallow- 
ing in Mud, they might the bettei rub oft any filth, that 
might happen there 
The Miifcles not fo diilindt, as in fome Brutes; and 
hence thc 'motion of their eyes not fo quick nor regular. 
The Pupil vonnd. The Opticl^nerve inferred almoft in 
tht Axis o1 thcEye; and on the infide, made a fmall 
dint. The f^f^rozi^j- of a pale violet, and brownifh colour. 
But we fhall now come, to what feems moft peculiar to 
this Animal; and as 1 know of , to be met with, in none 
befides ; and is mentioned by all not without great ad- 
miration, who have wrote of this fxrangeHog; vi^. l^h^ 
Glan * 
