598 



buccal, and after it has been drawn off the latter is seen to be com- 

 posed of large and fine-fibred components, representing probably the 

 visceral motor and communis components generally present in this 

 nerve. The external mandibular passes almost straight upwards internal 

 to the posterior half of the buccal below (but fitting into a depression 

 on it), and above internal to the interlacing fibres of the lateral oph- 

 thalmic and lateral buccal rootlets and immediately posterior to the 

 dorsal buccal rootlet. Posteriorly it gives off a few very small bundles 

 which represent its contribution to the lateral root and form its lateral 



The roots of the facial nerve of a 31 cm. Chimaera (Hydrolagus) colliei 

 drawn with Edinger's projection apparatus. ^ 8. a dorsal lateral line root, b lateral 

 lateral line root- c ventral root of the facial sensu stricto, cb median lobe of cere- 

 bellum, cb' restiform body, lat X position of the lateralis division of the vagus, md 

 medulla. 1 ophthalmic lateral line nerve. 1' its dorsal rootlet. 1" its lateral rootlet. 

 2 the buccal lateral line nerve. 2' its dorsal rootlet. 2" its lateral rootlet. S the 

 external mandibular lateral line nerve. 8' its dorsal rootlet. S" its very small lateral 

 rootlet, VII the facialis sensu stricto. VIII the position of the root of the auditory 

 nerve. 



rootlet (5")- The majority of its fibres however pass upwards as its 

 dorsal rootlet (5') to fuse first with the dorsal rootlet of the buccal 

 and then the compound with the dorsal rootlet of the ophthalmic, in 

 this way forming the dorsal lateral line root. In the sections the 



