214 Journal of Comparatu'e NEUKOLociv. 



numbered as in the figure last referred to and treated 

 successivel3^ The branch V, is discrete from the others and 

 passes farther dorsad to a separate foramen, F,, having pre- 

 viously divided, giving off a large branch ventrad which passes 

 through the foramen F, . Before this division it receives 

 a small ramus from V^;, another from V,, and gives one to the 

 combined trunk of V, and VII. The dorsal branch of V, 

 gives off a small twig before entering its foramen which 

 passes dorsad, then cephalad between the frontal bones. 

 After passing through the foramen it takes its course not far 

 from the median line superficially, giving off various fibres to 

 the frontal region, to terminate in the premaxillary. The 

 more ventral division of V,, after passing through the lower 

 foramen, Ff, is wrapped up with the fibres of V.; without, 

 however, losing its separate identity, receives at least two 

 separate small strands from V.,, and passes through the lower 

 part of the orbit, giving off several branches to the infra- 

 orbital region and the region behind and above the angle of 

 the mouth. The branch V., is also nearly discrete to its 

 origin. After passing through the foramen F.,, it gives off 

 the two branches above referred to, several small twigs to 

 the frontal region, two large branches to the posterior nasal 

 barbel, and terminates in several branches in the premaxillary 

 not far from the tejminus of the dorsal part of V,. It also 

 gives oft^ a considerable branch which supplies the supra- 

 orbital region and passes on to the anterior nasal region. 

 The branch V.. is nearl}^ distinct from the two preceding, but 

 more closely united with V^ until after they leave their 

 foramen. It gives off a considerable ramus soon after leaving 

 the foramen, which sinks down to the roof of the mouth and 

 terminates in the dental cavity of the premaxillary. The 

 major part of this branch passes farther laterad through the 

 orbit, giving two large rami to the barbie at the angle of the 

 mouth and others to the regions adjacent. Another branch 

 which passes through the foramen F., is V^, which connects 

 by means of a small ramus with Vj. After leaving the fora- 



