164 EDWARD PHELPS ALMS, JUN. 



organs 87 to 102 and the sensory organ of the spiracle, in 

 the manner already described. The branch that innervates 

 organs 103 to 110 is the ramus oticus facialis of current 

 descriptions. The three branches that together innervate 

 organs 87 to 102 probably represent the inner buccal of 

 Cole^s descriptions of Chimaeraj though it may be that that 

 nerve of Chimasra also includes the next two following 

 branches of the buccalis of Mustelus. These next two 

 following branches of the buccalis are given off, close to- 

 gether, from the lateral aspect of the ganglion of the nerve, 

 not far from the three preceding ones, but from a somewhat 

 distinct and different part of the ganglion. Each nerve is 

 joined at once by a general sensory branch, which arises 

 from the base of a large nerve that has its origin from the 

 postero-ventral end of the trigeminal part of the extra- 

 cranial part of the trigemino-facial ganglionic complex. 

 This large nerve is partly motor, and will accordingly be 

 described as a branch of the ramus mandibularis trigemini. 

 Its motor fibres are destined to innervate the levator maxillae 

 superioris and spiracle muscles. Each of the lateral sensory 

 nerves here under consideration, with its accompanying 

 general sensory branch, runs at first backward and laterally, 

 ventral to the peri-orbital sinus, then turns outward through the 

 sinus, and then forward and outward, the lateral components 

 separating from the general sensory ones and going to inner- 

 vate, respectively, organs 83 to 86, and 79 to 82, infra-orbital. 

 The next two branches of the buccalis arise from the 

 buccalis itself, and not from the ganglion of the nerve. 

 They are given off not far apart, from the lateral aspect of 

 the nerve, just as the ramus mandibularis separates from 

 the still united buccalis facialis and maxillaris trigemini. 

 There are thus no branches given off by the buccalis between 

 its point of origin from its ganglion, and the point where 

 the ramus mandibularis definitely separates from it. The 

 two branches given off at the latter point run forward a 

 considerable distance, nearly parallel to, and not far from 

 thp buccalis. The proximal one then first turns laterally, 



