we 
anastomosis between the sup. oph. of VIlth and the hyomandibular. 
I have not seen this, but suspect it is the dorsal root of the latter 
(6 in fig.). It is interesting to note that Mr. CoLLINGE, having over- 
looked the root of the Vth, figures the profundus as arising from a 
ganglion which represents that of the sup. oph. of VIIth. He further — 
describes an anterior Y-shaped commissural canal (a portion of my 
supra-orbital canal) as being innervated by the combined buccal and 
superior maxillary nerves. There can be no doubt that it is innervated 
by the sup. oph. of VII. The mandibular division of the Vth is de- 
seribed as innervating the mandibular canal (= my anterior hyo- 
mandibular canal), whereas the innervation is from the mandibular 
division of the VIlth, which, however, is only made to innervate the 
posterior hyomandibular canal. 
How Mr. CoLLINGE came to confuse the Vth and VIIth nerves, 
even putting the development of them aside, I am utterly unable to 
imagine. The separation of them is quite an easy matter, as my de- 
scription and figure above show, and STannius’ figure is so very 
suggestive to any one acquainted with the papers of Ewart and 
MARSHALL and SPENCER. 
An interesting feature in Mr. COLLINGE’s paper is a commissure 
between what I can see is the Gasserian ganglion and the sup. oph. 
of the VIIth. It is evidently the superficial ophthalmic of the Vth, 
which fuses with its namesake from the VIIth as in all 
Klasmobranches and does not remain distinct as de- 
scribed in my preliminary paper. Mr. Covtince figures but 
does not describe it, whilst it is both figured and described by 
STANNIUS in Chimaera. In the three Chimaera that I have 
examined, I have seen it once in the above condition, whilst the 
nerve does not fuse but remains distinct in a dissection of the nerves 
of Callorhynchus which Prof. Howes has in his laboratory. The 
examination of a large number of specimens is necessary to settle 
this interesting point. In the meantime, however, I distinguish three 
variations in the superficial ophthalmic division of the Vth as follows: 
1) It passes over and has no connection whatever with the nerve 
of the same name from the VIIth. 
2) It sends a few fibres to the latter nerve (see my preliminary 
paper). 
3) It completely fuses with the latter nerve. 
One word more on the Vth and VIIth nerves. It seems certain 
that a re-examination of the Ganoids will bring them into the scheme 
which includes already most Fishes and Amphibia. This has already 
