146 Edward Phelps AUis jr., 



being quite undoubtedly represented by double tubes and pores. The 

 anterior terminal squamosal pore has probably first fused with the 

 dorsal pore of the postorbital canal and then with a supraorbital pore 

 to form the anastomosis of the two main canals; and the compound 

 pore and tube thus here formed are quite undoubtedly represented in 

 the blind pouch already described at the dorsal end of the postorbital 

 canal. The posterior terminal pore and tube are quite undoubtedly 

 similarly represented in a blind pouch found at the dorsal end of the 

 preoperculo-mandibular canal. At this latter point four canals unite, 

 the main infraorbital, the supratemporal, the preoperculo-mandibular, 

 and the lateral canal of the body. Close to the extreme dorsal end 

 of the preopercular canal a large blind pouch has its origin, and 

 extends backward and downward in the angle between the preopercular 

 canal and the lateral canal of the body. It may also have a short exten- 

 sion forward of the preopercular canal. Its origin, at the point where the 

 four canals unite, indicates clearly that it represents a compound 

 primary tube formed at this point. The long axis of the pouch lies in 

 the line, produced, of that short section of the main infraorbital canal 

 that lies between the pouch and the hind end of the squamosal, and 

 the pouch opens into the preopercular canal directly opposite the 

 opening by which the main infraorbital canal communicates with it. 

 The lateral canal of the body begins immediately dorsal to this point, 

 and is hence not a direct continuation backward of the main infra- 

 orbital canal. It has much more the appearance of being a direct 

 continuation of the supratemporal cross-commissure, these two canals, 

 in that case, forming a single -canal which bends abruptly at this 

 point, anastomosing at the bend with the two other canals. The bend 

 lies between two fibro-cartilaginous and partly ossified tubes, one of 

 which lodges the lateral organ of the commissure and the other the 

 anterior organ of the lateral line of the body. That short section of 

 the main infraorbital canal that lies between the point of anastomosis 

 and the hind edge of the squamosal, although partly or entirely enclosed 

 in bone, lodges no sense organ. This, and the relations of the several 

 canals here concerned to each other, will be again later referred to. 

 The ten infraorbital organs of Conger are all innervated by 

 branches of the buccalis and oticus facialis, organs 1 to 8 being 



