THE EMBRYOLOGY OF THE HONEY BEE 123 



ATraL 



Oe(Flnt) 



x StgNv 



Ao, 



Mint 



,,-SupCom 



FtGng 



'SlkDO 



FIG. 45. Median sagittal section through the head of a newly hatched 

 larva (Stage XV), intersecting the supraoesophageal commissure 

 (SupCom), the frontal ganglion (FtGng), the stomatogastric nerve 

 (StgNv), the oesophagus (Oes), and the suboesophageal ganglion 

 (SoeGng), x 243. 



-PhyGng 



FIG. 46. Transverse section of the oesophagus, showing the pharyngeal 

 ganglia (PhyGng), x 534. 



plane between the two halves of the brain just above the oesopha- 

 gus. This nerve consists, near its point of origin, of a thick 

 bundle of nerve fibres surrounded by a sheath of ganglion cells, 



