TRANS MFC. SOC. VOL. XII. NEW SERIES. PLxlTS XIV. 
Fig. i. 
Anaiigeuient of muscular fibres, _nerves. and tractiese of the common ma*^ot. The muscles represented 
are concerned in shortening the bb'dy. They are connected at each extremity with one of the segments. 
'Ihe contractile tissue of the m.uscular fibre in the centre of the drawing has been ruptured, and has 
contracted within the tuba of the sarcolemma. A fine branch of the nerve trunk is seen to cross the 
sarcolemraa and give oif a still finer branch, which, after being followed for a short distance, appears 
lost upon the sarcolemma. If the nerve trank be traced, many other branches distributed in a similar 
manner will be observed. The trachea, represented only in one part of the drawing, are black. X 40. 
Fig. 2. 
CI a 
The point where the fine nerve trunk, which seems to be lost upon the surfac;* 
of the sarcolemma in Fig. 1, leaves the larger trunk which crosses the muscle. 
Observe that the fibres of the fine branch divide into two bundles, which proceed 
in opposite directions in the nerve trunk. X 1100. 
L. S B. ad nat. March, 1S64. 
[Harrison's Irnpt. 
