[ no ] 
are hungry, they are pretty keen after their food; but 
they are foon fatisfied, not being able to contain much at 
one time. An ele,6trical filli of three feet and upwards 
in length cannot fwallow a fmall fhli above three or at 
moft three inches and a half long. Since I wrote the 
above defcription and remarks, I have had Mr. Ban- 
croft’s Effay on the Natural Hiltory of Guiana put into 
my hands, in w'hich I find an account of this animal ; 
hut, as I think that he has not been very particular in 
the defcription of it, I refolved ftill to fend you the above 
account, that you might judge for yourfelf. I obferve, 
that his account or defcription and mine differ in feveral 
things ; and amongft others, where he fays, that thofe 
filli were ufually about three feet in length ; but the one, 
of which I have fent a flight defcription, was three feet 
eight inches. This fmall variation might indeed have 
happened without any error ; but I am told, that fome of 
them have been feen in Surinam river upwards of twenty 
feet long, whofe flroke or fhock proved inftant death to 
any perfon that unluckily received it.. 
I fliall be on the watch to procure a more accurate 
knowledge of, and acquaintance with, this animal; and if 
I can learn any thing farther about it, you may depend, 
on my communicating it. 
XII. Experiments 
