[ *34 1 
part of an inch a funder. Their di fiance 
is greater towards the tail in proportion 
to the iticreafe of breadth of the organ. 
The organ is about half an inch in breadth, 
and has fourteen fepta. 
Thefe fepta in both organs are very 
tender in confidence. They are interfe&ed 
tranfverfely by very thin plates or mem¬ 
branes, whofe breadth is the difiance be¬ 
tween any two fepta. 
Their lengths are equal to the breadths 
of the fepta, between which they are 
fituated. There is a regular feries of 
them continued from one end of any two 
fepta.to the other. They appear to be for 
clofe as even to touch. In an inch in 
length there are about two hundred and 
forty, which multiplies the furface in the 
whole to a vafl extent, 
& I have dwelt a moment upon the flruc- 
ture of the eledtrical organs of the two 
fifhes, in 'order to fhow their difference, 
4 : 
although 
