i i37 1 
The abundant cellular membrane, 
which enters into the composition of 
mufcles, extends beyond them, becomes 
clofely compacted, and takes on the form 
of a round Slender cord, which is known 
by the denomination of tendon, the exter¬ 
nal tunic or covering of which is Similar 
to that of the mufcles. If, in head of 
forming a cord or band, it expands into a 
broad flat furface or membrane, it is called 
aponeurcfis. 
Mufcles, which are not inferred into 
any of the bones, have commonly no ten¬ 
dons. Thus there obtain in mufcles, as 
well as in the electrical organs of the tor¬ 
pedo and gymnotus, cylinders, partitions, 
a great fubdiviflon of parts, and an enor¬ 
mous extent of furface. But this is not 
all—the blood-vefl'els of the electrical 
organs are very numerous, follow the 
courfe of the nerves, and diflribute their 
fmall branches along with them. The 
quantity 
