256 ALUS. [Vol. XVIII. 



Anterior to this third branch of the buccaUs the relations of the 

 buccalis and maxillaris superior to each other, and the number and 

 disposition of their branches, varied greatly in different specimens. 

 One large branch was usually sent to the connective or dermal tis- 

 sues of the region, the branch arising sometimes from the united 

 nerves and sometimes from one or the other of the two strands 

 into which they separate after their first anastomosis. Another 

 large branch was always given off from the superficial strand of 

 the united nerves, and seemed destined, wholly, to the innerva- 

 tion of the first five infraorbital organs. One branch of this nerve 

 entered the suborbital bone and innervated organ No. 5. A second 

 branch (Fig. 53) always pierced the suborbital bone and then en- 

 tered the infraorbital canal by the opening by which that canal 

 issues from the hind end of the lachrymal. In this canal in the 

 lachrymal the branch ran forward and innervated organ No. 4. 

 The other branches of the nerve pierced the lachrymal separately, 

 and entering the canal in that bone supplied organs 3, 2 and i, the 

 nerve ending in the latter organ. The branch that suppplied organ 

 2 was usually double at its outer end. 



After giving ofif this large lateral sense organ branch, the one 

 or two strands of the united nerves run forward, internal to the 

 lachrymal and lateral to the ligament that binds the palato-quad- 

 rate to the posterior surface of the antorbital process of the skull, 

 this latter ligament thus having the same relations to the nerves 

 that the third division of the levator maxillae superioris muscle 

 has in Amia. In this part of their course, in Scomber, the two 

 strands of the nerve were usually, but not always, found united in 

 a single nerve. From the single nerve, or from the larger of the 

 two strands where there were two, the maxillary branch of the 

 maxillaris superior is here given off. Turning downward and for- 

 ward this branch reaches the dorsal edge of the maxillary, and 

 there separates into two parts, both of which pass internal to the 

 maxillary, one turning forward and the other backward. Both 

 parts soon break up into several branches, which spread forward 

 and backward along the mesial surface of the maxillary, and the 

 lateral surface of the premaxillary. 



Immediately after giving off this maxillary branch the one or 

 two main strands send two or more branches upward and forward 



