STRUCTURE OF MUSCLES. 193 
opinion, equally remarkable, prevail among observers, with 
regard to the appearances of these primary fibres. 
Lertvwenueck found the filaments of the muscles of a 
frog transversely striated. When recent, they were cylin- 
drical ; but, upon drying, they contracted, and exhibited a 
groove on one side*. Mr Bauer describes them as moni- 
liform +, and apparently constructed of a series of globules. 
These globules Sir E. Home is inclined to consider as the 
remains of the globules of the blood, from which they have 
originated, adhering in a line; an opinion which the facts 
of the case by no means warrant f. 
At the extremities of the muscular fibres, where they 
are attached to the more solid parts, there are usually threads 
of a substance, differing in its appearance from the muscle; 
and denominated TJ'endoz or Sinew. The tendons are, in 
general, of a silvery-white colour, a close, firm, fibrous tex- 
ture, and possess great tenacity. ‘The threads of which 
they consist, are attached on the one extremity to the sur- 
face of a bone, or other hard part ; and on the other, they 
are variously interspersed amongthe fibres or bundles of the 
muscle. They are considered as destitute of sensibility 
and irritability, and form a passive link between the muscle 
and the bone, or other pomt of support. 
The muscles, after being freed from those substances 
which adhere to them, such as bloodvessels and cellular tis- 

* Oper. Om. vol. ii. p. 58, f. 4. & p. 59. f. 5. 
+ By the term Moniliform naturalists in general refer to an organ, con- 
sisting of globules lineally and closely arranged, like the beads of a neck- 
lace, When the globules press so closely as to alter their shape, and render 
the line of separation less distinct, the term Jointed is usually applied. On 
the other hand, when the globules are a little distant from one another, with 
an apparent connecting thread, the term Perfoliate is substituted. 
{ Phil. Trans. 1818, tab. viii. f. 4, 5, 6. 
