50 Dixon——On the Development of the Branches of the Fifth Cranial Nerve in Man. 
ganglion (motor vagrant) in connection with certain fibres of the third nerve, fell 
into the error of considering its cells to possess structure similar to the cells of a 
spinal ganglion, and even compares the geniculate ganglion of the facial nerve to 
the ciliary ganglion. Both Gaskell, and Langley and Anderson admit, that they 
have only demonstrated, that the greater number of the cells of the ciliary 
ganglion are connected with fibres of the third nerve, while Gaskell describes a 
small group of cells in the ganglion connected with the fibres of the fifth nerve. 
Superior Maxillary Division of the Fifth Nerve. 
Empryo Br;.—(4 weeks, 6°9 mm.). Figure 11, Plate II. 
The superior maxiliary nerve takes origin from the anterior part of the 
Gasserian ganglion, and passes forwards and a little upwards, beneath the 
eyeball. The Gasserian ganglion above the origin of this nerve has a circular 
outline, in horizontal section, whereas, when the level of the superior maxillary 
nerve is reached, a section of the ganglion is egg-shaped, the pointed end of the 
egg corresponding to the place where the nerve arises. ‘The length of the nerve 
is 0-4 mm. 
No trace of Meckel’s ganglion was found, unless the nuclei present among the 
fibres of the nerve near its origin represent the cells of a ganglion, This has 
been suggested by Professor His,* who, describing the cells present among the 
fibres of the superior and inferior maxillary nerves of this embryo, says :— 
“Dies das Hauptganglion iibersehreitenden Zellen sind als die Anlagen der 
kleinen Trigeminusganglien, des G, rhinicum, und des G@. oticum anzusehen.” 
Empryo Ru.—(5th week, 9'1 mm.). Figure 12, Plate II. 
The superior maxillary nerve, arising from the anterior part of the Gasserian 
ganglion, passes horizontally forwards beneath the eyeball. At first the fibres of 
the nerve are constricted into a compact bundle, but they spread out somewhat 
as they pass forward towards the face. A few bundles of fibres pass inwards 
towards the roof of the primitive mouth cavity. The length of the superior 
maxillary nerve is 0°8 mm. 
At the level of the superior maxillary nerve, the third and sixth nerves end 
close to one another, the third nerve coming from above downwards, forwards, 
and a little outwards, and the sixth from below upwards, forwards, and a little 
* « Geschichte des Gehirns sowie der centralen und peripherischen Nervenbahnen beim menschlichen 
Embryo,” Abhandlungen d. Konig]. Siichs Ges. d. Wissensch., 1888, Bd, iy., p. 372. 
