989 
fibrillar network with the network lying between the muscle-cells 
on one side, with an exceedingly fine protoplasmatie reticulum on the 
other side, losing itself in the cytoplasm, could be seen with ereat 
clearness. 
Thus the apparent controversy between the relations of the accessory 
nerve-terminations and the striated muscle-fibres on the one hand, 
of the sympathetic nerve-terminations and the plain muscle-cells on the 
other hand, is seen to disappear. In the plain muscle-cells we find 
the same identical relations of nerve-endings and sarcoplasm as in 
the striated musele-fibres. In both elements the neurofibrillar appa- 
‘atus penetrates into the protoplasmatic (sarcoplasmatic) cell-body, 
forms the terminal nerve-endings inside the cell-body as small 
end-rings and loose netlike extremities or varicosities, and is in con- 
tinuous connection with a very delicate protoplasmatie (or intra- 
protoplasmatic) reticulum, the periterminal network. 
Leiden, December 1914. 
Anatomy. — “On the mode of attachment of the muscular fibre to 
its tendonfibres in the striated muscles of the vertebrates.” 
By Prof. J. Borkr. 
(Communicated in the meeting of December 30, 1914). 
Where the cross-striated musclefibres end in a tendon, the tendon 
“becomes subdivided into as many small bundles as there are fibres 
in the end of the muscle, and each separate musclefibre has its 
separate small bundle of tendonfibrillae, to which it is attached. It 
often seems at first sight as if the tendon-fibres are directly continued 
into the muscular substance, but until recently it was generally 
admitted, that the fibres of each tendon-bundle ended abruptly on 
reaching the rounded or obliquely truncated often somewhat swollen 
extremity of a muscular fibre, and are only so intimately united to 
the prolongation of sarcolemma which covers the rounded extremity 
of the muscular fibre entirely, as to render the separation of the two 
diffieuit if not impossible, while the muscular substance, on the other 
hand, may readily be caused to retract from the sarcolemma at this 
point as at other points of its course. 
While thus it was until recently generally admitted, that the 
extremity of a muscle fibre was covered entirely by the uninterrupted 
sarcolemmal membrane, in the year 1912 O. Scnurtze *) and after 
him several of his pupils published the results of observations of a 
1, O. ScHuLttze. Ueber den direkten Zusammenhang von Muskelfibrillen und 
Sehnenfibrillen. Arch. f. Mikrosk. Anatomie, Bd. 79. 1912. pag. 307 —351. 
