C 402 ] 
tender in confiflence, being eafily torn. They appear 
to anfwer the fame purpofe with the columns in the /or- 
pedoy making walls or hutments for the fub-divifions, 
and are to be confidered as making fo many diftincl or- 
gans. Thefe Jepta are interfedted tranfverfely by very 
thin plates or membranes, whofe breadth is the diltance 
between any two fepta^ and therefore of different breadths 
in different parts ; broadelf at that edge which is next to 
the Ikin; narroweft at that next to the center of the body, 
or to the middle jDartition which divides the two organs 
from one another. Their lengths are equal to the 
breadths of xhQ.fepta, between which they are fituated. 
There is a regular feries of them continued from one 
end of any two Jepta to the other. They appear to be 
fo clofe as even to touch. In an inch in length there 
are about 240, which multiplies the fm'face in the whole 
to a vail extent. 
OF THE NERVES. 
The nerves in this animal may be divided into tv 0 
kinds; the firft, appropriated to the general purpofes 
of life; the fecond, for the management of this peculiar 
fundlion, and very probably for its exigence. They 
arife in general from the brain and 'medulla /pin alls, as in 
other fifli ; but thole from the medulla are much larger 
than in fhh of equal fize, and larger than is neceffary tor 
the common operations of life. The nerve which 
arifes from the brain, and paffes down the whole length 
of the animal (which I believe exifts in all fifli) is larger 
in 
