172 
Die drei hier als Bandspanner beschriebenen Varietäten haben noch 
das Interessante, daß sie Beispiele für drei verschiedene Arten von 
Abnormitätenbildungen liefern. 
Bei dem unter IIIa (Fig. 3a) beschriebenen Falle geht von der 
Sehne eines vollständig normal verlaufenden Muskels eine Nebensehne 
ab, bei dem unter I (Fig. 1a und b) beschriebenen Falle trennt sich 
von dem normalen Muskel ein Muskelbündel ab, um die Varietät zu 
zu bilden, und endlich bei II (Fig. 2a) ist ein selbständiger kleiner 
Muskel vorhanden. 
Nachdruck verboten. 
On the Sensory and Ampullary Canals of Chimaera. 
By Frank J. Core, Demonstrator of Zoology, University College, 
Liverpool. 
With 1 Figure. 
Last month I published a preliminary paper on the cranial nerves 
of Chimaera in the Proceedings of the Royal Society of Edinburgh (1). 
To-day a paper with the above title by Mr. CoLLinge in the Pro- 
ceedings of the Zoological Society of London (2) has just come into 
my hands, and as Mr. CoLLınge’s results are about as different from 
mine as they well could be, it is very necessary, pending the publi- 
cation of my full paper with figures, that I should point out the 
erroneous character of Mr. CoLLIngE’s observations. As Mr. COLLINGE’s 
paper differs from mine principially as regards the Vth and VIIth nerves, 
I propose to consider these before the others. 
First as to the facts: — 
If the eye of a Chimaera be removed two large nerves, amongst 
others, will be seen coursing across the orbit. The dorsal one, as I 
shall show, is the superficial ophthalmic of the VII th (8.0. VIT in 
fig.), and the ventral the main trunks of the Vth and VII th nerves. 
With regard to the latter, leaving out the hyomandibular nerve (7), 
which is easily distinguishable, two main divisions are easily defined 
— an anterior and a posterior (TR. and B). If the distribution of 
these be worked out, it will be seen that the anterior (T'R.) crosses 
under the posterior (DB) and gives off — first the mandibular nerve (JZN.), 
which dips down at once, and afterwards the maxillary nerve (MX.). 
There is this, and only this, complication — and in no other respect 
is there the least confusion between these anterior and posterior 
