166 EDWARD PHELPS ALMS, JUN. 



bend of the canal ; tliat is, organ 69 lies in tlie circum- 

 orbital part of the canal, shortly posterior to the point 

 where the canal turns downward and backward venti'al to 

 the anterior edge of the eye, and organ 46 lies immediately 

 proximal to the point where the infra-orbital canal anasto- 

 moses with the distal end of the supra-orbital canal. This large 

 lateral sensory branch, the ampullary branch, nnd certain 

 general sensory branches, together form a large group of 

 nerves, which have the appearance of being a somewhat 

 separate branch or division of the truncus buccalis-maxillaris. 



The second and remaining portion of the buccalis forms 

 an anterior or terminal division of that nerve. It runs 

 forward along the external surface of Add/3 with the 

 remaining portion of the ramus maxillaris, the two nerves 

 lying close together, but as two wholly separate strands. 

 The buccalis here lies lateral to the maxillaris, and soon 

 separates into two parts, one destined to innervate organs 

 26 to 45 infra-orbital, which lie between the point where the 

 canal anastomoses with the distal end of the supra-orbital 

 canal, and. the middle point of the short median section 

 of the canal ; and the other one destined to innervate organs 

 1 to 25. The branch destined, to supply these latter organs 

 forms the terminal section of the entire nerve, and in its 

 forward course it crosses ventral — that is, superficial to the 

 ramus maxillaris, and reaches its mesial side. 



This anterior division of the buccalis thus innervates the 

 organs that lie in that part of the infra-orbital canal that 

 corresponds to the anterior, or antorbital, cross-commissure 

 of my descriptions of Amia. The nerve accordingly corre- 

 sponds to that somewhat separate and terminal part of 

 the buccalis that in Amia innervates organs 1 to 4 infra- 

 orbital (2, p. 514). In Chimtera, Gadns, and Scomber the 

 corresponding fibres of the buccalis also form a separate 

 branch or division of the nerve, and I have already had occa- 

 sion to call especial attention to it, not only in the work on 

 Scomber that is still in press, but also in one of my published 

 works (4, p. 366). This bi'anch or division of the buccalis, 



