378 Journal of Comparative Neurology. 



cephalad {sf. opJi. S7ip.^ Fig. 25) running into the sympa- 

 thetic strand for the supra-orbital trunk, finally to termin- 

 ate in the ramus ciliaris longus. The more lateral lobe 

 receives a strong bundle of medullated root fibr s from the 

 Gasserian ganglion {0. pr. r. Fig. 24) and contains mingled 

 among the sympathetic ganglion cells larger ones which 

 apparently belong to the fibres from the trigeminus root 

 and which become more numerous farther cephalad. The 

 radix longa of the ciliary ganglion arises from this lateral 

 lobe (Fig. 25) and apparently contains both sympathetic 

 and trigeminal fibres. All of the fibres from the lateral 

 lobe enter the radix ciliaris longa. 



These fibres from the Gasserian ganglion to the radix 

 longa are presumably of general cutaneous and not sym- 

 pathetic nature. They could not be separately followed 

 through the ciliary ganglion and hence their peripheral 

 distribution is unknown. Their morphology is discussed 

 in Section 7, XL 



From the lateral lobe of the first sympathetic ganglion 

 a minute sympathetic twig goes off ventrad and joins the 

 ventral ramus of the n. oculomotorius just after the 

 separation of the dorsal ramus and just" before its anasto- 

 mosis (radix brevis) with the ciliary ganglion. 



The ramus ciliaris brevis arises from the ciliary gan- 

 glion, which is provided with two roots in the typical 

 way, the radix longa from the Gasserian ganglion and the 

 radix brevis from the III nerve. The radix longa is com- 

 posed mostly of small and medium-sized fibres with a few 

 very large ones. It turns abruptly mesad and ventrad to 

 the ciliary ganglion which lies in contact with the III 

 nerve. 



The ciliary ganglion is composed for the most part of 

 the very small cells so characteristic of all of the ganglia 



