X 



14. noive of siphonal retractors. 



15. „ „ crista statica. 



16. „ „ macula statica. 



17. siphonal nerve. 



18. nerve wliicli is distributed to tlie lower side of the head. 



19. olfactory norve. 



20. nerve which is distributed (?) to muscles of eye. 



21. „ „ „ „ to base of arms. 



Bc.G. brachial nerve ring and ganglia. O.G. outhne of the optic ganglion. 



B.G. suprabuccal ganglion. Pe.G. pedal ganglion. 



B. G.i infrabuccal „ Pr.G. propedal ganglion. 



G.G. cerebral „ Vi.G. visceral „ 



TEXT FIGURE 16. Photographs of the giant nerve cell and its fibre. 



, & B. adjacent sagittal sections thru the pedal ganglion. 



C. transverse section „ „ „ „ 



D. median sagittal section „ „ visceral „ showing the chiasma of the fibres of the 



giant cells. 



C. giant cell. 



F. fibre. 



M. epithelium of the macula statica. 



P.P. pedal process of skull in section. 



S. statolith lying in the cavity of the statocyst. 



Si.N. siphonal nerve. 



