94 ALBERT KUNTZ 



SUMMARY 



1. The ciliary ganglion arises from cells which advance periph- 

 erally from the mesencephalon and the semilunar ganglion respec- 

 tively along the oculomotor and the ophthalmic nerves. The 

 earhest anlage of the ciliary ganglion arises in contact with the 

 oculomotor nerve. The majority of the cells which become 

 incorporated in the ciliary ganglion, doubtless, advance periph- 

 erally along this nerve. These observations substantially con- 

 firm the observations of Carpenter ('06) on the development of 

 the ciliary ganglion in the chick. 



2. The sphenopalatine ganglion arises along the median surface 

 of the maxillary nerve from cells which advance peripherally 

 from the semilunar ganglion, 



3. The otic ganglion arises at the median surface of the proxi- 

 mal part of the mandibular division of the trigeminal nerve from 

 cells which advance peripherally from the semilunar ganghon 

 and from the wall of the rhombencephalon respectively along the 

 sensory and the motor roots of the mandibular nerve. 



4. The submaxillary ganglion arises in the mandibular region 

 in proximity with the lingual division of the mandibular nerve 

 from cells which wander out from the semilunar ganghon and the 

 wall of the rhombencephalon respectively along the sensory and 

 motor roots of the mandibular nerve and advance peripherally 

 along the lingual division. 



5. The oculomotor and the trigeminal nerves sustain the same 

 genetic relationship to the cranial sympathetic ganglia as do the 

 spinal nerves to the gangha of the sympathetic trunks and the 

 prevertebral sympathetic plexuses and the vagi to the vagal 

 sympathetic plexuses. 



6. The cihary, the sphenopalatine, the otic and the submaxil- 

 lary gangha arise in an analogous manner and bear the same 

 genetic relationships to the cerebro-spinal nervous system as do 

 the other parts of the sympathetic nervous system. Ontogenetic 

 evidence, therefore, warrants the conclusion that these ganglia 

 are sympathetic in character. 



