NERVES OF THE DOGFISH 



301 



rs., m. rectus dorsalis (superior) and 

 its innervation 



sac, sacculus 



sacvs., saccus vasculosus 



sbsp., m. subspinalis and its innerva- 

 tion 



sea., anterior semicircular canal 



scl., sclerotic coat of the eyeball 



so., m. obliquus dorsalis (superior) and 

 its innervation 



sp.1-6, first six spinal nerves 



sp.lm., motor portion of the first spinal 

 nerve 



sp.lrm., motor root of the first spinal 

 nerve 



sp.ls., sensory portion of the first spinal 

 nerve 



sp.Sm., motor portion of the third spi- 

 nal nerve 



spSs., sensory portion of the third 

 spinal nerve 



spr., spiracle 



sptpo., supratemporal pit-organs 



spt.IX, ramus supratemporalis IX 



spt.X, ramus supratemporalis X 



sp.V, tractus spinalis trigemini 



sp.Va, anterior continuation of the pre- 

 ceding 



sy., sympathetic nerves 



tm., tectum mesencephali 



trap., m. trapezius and its innervation 



tr.hmd.VII, truncus hyomandibularis 

 VII 



tr.io.V+VII, truncus infraorbitalis 

 (mx.V+buc.VII) 



trm., trunk muscles 



utrc, utriculus 



v, w, x, y, z, the five occipital nerves 



v.l, first vertebra 



visc.X, ramus visceralis X 



vpo., ventral series of pit-organs and 

 their innervation 



/, nervus olfactorius 



II, nervus opticus 



III, nervus oculomotorius 



Hid., dorsal division of the oculomotor 

 nerve 



IIIi)., ventral division of the oculo- 

 motor nerve 



IV, nervus trochlearis 



IVch., decussation of the trochlear 

 nerve 



IVndl., nidulus of origin of the troch- 

 lear nerve 



IVr., root of the trochlear nerve 



Vrm., motor root of the trigeminal 

 nerve 



VI, nervus abducens 



VII, nervus facialis 



VI Ml., lateral-line roots of the facial 



nerve 

 VHrlld., dorsal lateral-line root of the 



facial nerve 

 Vllrllv., ventral lateral-line root of 



the facial nerve 

 VHrm., motor root of the facial nerve 

 VHrvs., visceral sensory root of the 



facial nerve 



VIII, auditory nerve 



VHIr., root of the auditory nerve 

 VIIIs., saccular division of the audi- 

 tory nerve 

 VIIIv., vestibular division of the audi- 

 tory nerve 

 IXr., root of the glossopharyngeal 



nerve 

 XV., roots of the vagus nerve proper 

 Xr.br. 1-4, roots of the four branchial 



nerves of the vagus 

 Xrll., lateral-line roots of the vagus 

 Xrm., motor rootlets of the vagus 

 Xrvs., visceral sensory rootlets of the 

 vagus 



