PLATE 3 



EXPLANATION OF FIGURES 



13 Section showing the central body, cb., the mushroom bodies, the optic 

 lobes, and the anterior dorsal commissure, a. cm. 



14 Section showing the distal ends of the mushroom body stalks beneath the 

 central body, and the division of these stalks into two parts. The ventral parts, 

 p.r., represent the posterior roots of the mushroom bodies. Fibers are seen pass- 

 ing from the outer ocellar lobes, o.oc.l., into the anterior d,orsal commissure, 

 a. cm. 



15 Section through the posterior end of the protocerebral lobes, where these 

 are united with the subesophageal ganglion, showing the posterior roots of the 

 mushroom bodies, p.r., and the posterior dorsal protocerebral commissure, p.cm. 



16 Section showing the subeosophageal ganglion, the labral nerve, and the 

 trito-cerebral lobes and nerves, tr.l, tr.n. 



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