ii 4 THE EMBRYOLOGY OF THE HONEY BEE 



Com 



Mel Nv 



Nlm 



NvF 



NvF 



Con 



Com 



Fig. 37. Sections illustrating the structure of the ventral cord of a 

 newly hatched larva (Stage XV), x 900. A, transverse section through the 

 second thoracic ganglion, showing the lateral nerves (Nv), neurilemma 

 (Nlm), commissure (Com), and neuroblasts (Nbl). B, transverse section 

 through the connectives between the second and third thoracic ganglia, 

 showing nerve fibres (NvF) and neurilemma (Nlm). C, sagittal section 

 of the third thoracic ganglion. D, coronal (horizontal) section through 

 the third thoracic ganglion. 



