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II. Wissenschaftliche Mittheilungen.. 
1. On the Segmental Sense organs of the lateral line, and on the Mor- 
phology of the Vertebrate Auditory organ. 
By John Beard, Zool. Station, Naples. 
(Schluß.) 
-eingeg. 22. Dec. 1883. 
Thus it is seen that all the segmental nerves in front of the vagus 
have dorsal branches for the supply of segmental sense organs. 
From this point the matter is no longer so simple; we have now 
to deal with a nerve complex. It is merely repeating a well known 
fact in stating that the vagus is formed by the fusion together of at 
least six segmental nerves. 
In Scyllium and Pristiurus (Van Wijhe) the vagus is formed by 
the fusion of three primitive roots, and hence in this case represents 
at least three segmental nerves. In Notidanus and in Marsipobranchii 
