607 
mesial to the tendinous end of the mesial half of the obliquus superior, 
separated into two strands. One of these strands perforated the oph- 
thalmic branch, the other passing ventral to it. Beyond the ophthalmic 
nerve the two strands of the trochlearis again united. 
Practically the same arrangement of these two nerves was found 
on the other side of the head, where the obliquus superior muscle was 
entirely normal. 
No nervous connection whatever between the trochlearis and 
ophthalmicus superficialis could be found on either side of the head, 
but as the dissection was somewhat rapidly made some connecting 
strands may possibly have existed and been broken. 
The other nerves and muscles of the orbit were apparently normal, 
but the rectus superior and rectus internus were simply two parts of 
a single muscle, being united for about one half their length. 
Whether this abnormal obliquus superior is an instance of reversion 
or not, is of course wholly conjecture. It seems, however, to have some 
relation to that shifting of the origin of the muscle from the hind wall 
of the orbit to its anterior wall that FÜRBRINGER suggested, and to 
which I have referred in an earlier work '). 
The fused condition of the rectus superior and rectus internus 
certainly indicates that these two muscles together represent the single 
rectus muscle innervated by the superior branch of the oculomotorius 
in Ganoids and in the higher Vertebrates, that is the rectus superior 
of those animals. 
Palais Carnolés, Menton, October 7th 1899. 
Nachdruck verboten. 
W. FLEMMING und die „Mitomlehre“. 
Von Prof. Dr. Jutrus Arnoup in Heidelberg. 
In meiner Arbeit über feinere Structur und Architectur der Zellen ?) 
habe ich mir eine Besprechung der verschiedenen Protoplasmatheorien 
und eine Erörterung der Bedeutung meiner Befunde für die Proto- 
plasmalehre im Allgemeinen ausdrücklich vorbehalten. — Schon früher 
war es mir gelungen, an lebenden und überlebenden Zellen interessante 
Aufschlüsse über die Reaction gewisser Zellmikrosomen bei der ,,vitalen“ 
1) Epwarp Pnerrs Auuis jr., The Cranial Muscles and Cranial and 
First Spinal Nerves in Amia Calva. Journ. of Morphol., Vol. 12, March 
1897, No. 3, p. 529. 
2) Archiv für mikrosk, Anatomie, 1898, Bd. 52, H. 1—3. 
