[ 1 33 1 
The fmall organ lies along the lower 
edge of the animal under the mufcles, 
which move the fin. Its anterior end 
begins nearly in the fame line with the 
large organ, and terminates altnoftTnfen- 
fibly near the end of the tail, where the 
larger organ aifo terminates. Its anterior 
end is the narrowed: part. In the middle 
of the organ it is thickeft, and becomes 
gradually thinner to the tail, where it is 
very thin. The two fmall organs are fe- 
parated from one another by the middle 
mufcles, and by the bones. 
They have the fame kind of fepta as 
the large pair; in length pafling from 
end to end of the organ, and in breadth 
palling quite acrofs: they run fomewhat 
ferpentine ? not exactly in ftraight lines. 
They differ very much in breadth from 
one another, They run pretty parallel to 
one another, but much- nearer than thofe 
of the large organ, being only about -fs- 
K 3 part 
