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myotomes, or at those points of the larval body, where (as is the 
case with the muscular differentiations in the head and neck region 
of the larvae) the muscular elements are arranged more loosely and 
less regularly, and, instead of being closely packed together as is 
the case in the myotomes, often end separately or in small bundles 
in the connective tissue, everywhere we see the formation of the 
connective tissue fibrils, the tendonfibrils, established in such a manner 
{hat the tendon-fibrils are formed in direct connection with the 
myofibrillae, but outside the sarcolemma. 
Thus the investigation of the phenomena of muscular differentiation 
in the muraenoid larva shows us the following picture of the connection 
between muscle fibre and tendonfibrils: inside the muscle fibre striated 
myofibrillae running through the entire length of the fibre, but losing 
their striation at a small distance of the end, and being attached to 
the inside of the sarcolemma at the end of the muscle fibre as a 
homogeneous fibril bearing some resemblance to a tendon fibril. Then 
follows the delicate line of the sarcolemma running around the 
extremity of the muscle fibre, to which are inserted the homogeneous 
ends of the myofibrillae; outside the sarcolemma, attached to it at 
exactly the same points where the myofibrillae are inserted, appear 
the tendonfibrillae, running at first in exactly the same direction as 
the myofibril with which they are connected. Thus there is established 
a continuity, but not in the sense of SCHULTZE. 
But it is easy to understand, that as soon as the myofibrillae 
accumulate to such numbers as to fill up nearly the entire cell body, 
it will become extremely difficult to follow the delicate line of the 
sarcolemma between those bundles of fibrils lying as close together. 
And then it is we get the pictures drawn by Scrurrze in his figures 
and known to us from many a preparation, in which the sarco- 
lemma is clearly defined where there are no myofibrils and only 
sarcoplasm is present, but in which at those points, where close 
bundles of myofibrillae attain the end of the muscle fibre, no dividing 
boundary-line of sarcolemma is to be seen between those bundles 
and the tendonfibrils lying in the same plane and running in the 
same direction. This is the continuity which in the figures of SCAULTZE 
is so conspicuous and seems to be so conclusive. 1 hope | have 
been able to demonstrate that at least in the case I have studied, 
it is only an apparent, not a real continuity. 
The observations of Scuunrzr are right, his deductions from these 
must be regarded with true scepticism, and the conclusions drawn 
by Dr. van HeRWERDEN from her trypsine-digestion-preparations, and 
declared by Scnuurze to be wrong, are, when viewed in the light 
