Transverse Nerves 



45 



nerve-cells are, as in other insects, ventral to tlie fibrous 

 tracts. 



Each franglion sends branches to its own se2:ment. Branches 



^ ^ ° of distribu- 



"Where the ganglion is shifted out of its proper segment tion. 

 the branches retain their primitive distribution. 



The last ganglion sends a pair of nerves to the ventral 

 surfaces of each of the last two abdominal segments. 

 There are probably nerves, which we have not clearlj- 







^ 



t/r.'i'iiKi.M: 



s^i. 



Fig. ,^6. — Nervoiis system of adult larva (hinder part), s.gl, sexual glands. 

 «", n'", nerves i^assing from last ganglion to muscles of eighth and ninth 

 abdominal segments. 6, ventral blood-gills. The rest as in fig. 35. 



seen, connected with the ganglia at the bases of the 

 bunches of sensory hairs (pp. 35, 49). 



A transverse nerve proceeds from each of the thoracic Transverse 



„ 1 1 • 1 1 nerves. 



and abdominal ganglia, except the hrst abdominal, and 

 runs transversely above the ventral cord, usually along 

 the junction of two segments (figs. 35, 36). Each is con- 

 nected by a longer or shorter median nerve with one of 



