Text Appearing Before Image: PLATE 2 EXPLANATION OF FIGURES Figures 10 to 16 are taken from a series of frontal sections of the head of thequeen of Lasius niger, beginning at the anterior end. The fibrous core is mottled,the nerve cell layer is blank. Oc. 4, AA, Zeiss, stage level. 10 Section through the anterior part of the protocerebral lobes, p.l., and theantennary lobes, a.l., anterior to the mushroom bodies. 11 Section through the anterior part of the mushroom bodies, and showingthe origin of the labro-frontal nerve, l.fn., from the antennary lobe. 12 Section through the stalks, st, of the mushroom bodies, and the anteriordorsal protocerebral commissure, a.cin. 562 BRAINS OF THREE GENERA OF ANTS CAROLINE BURLING THOMPSON 0. n. PLATE 2 Text Appearing After Image: THE JOURNAL OF COMPARATIVE NEUROLOGT, VOL. 23, NO. 6, 1913 563 PLATE 3 EXPLANATION OF FIGURES 13 Section showing the central body, cb., the mushroom bodies, the opticlobes, and the anterior dorsal commissure, a.cm. 14 Section showing the distal ends of the mushroom body stalks beneath thecentral 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 theseare united with the subesophageal ganglion, showing the posterior roots of themushroom bodies, p.r., and the posterior dorsal protocerebral commissure, p.cm. 16 Section showing the subeosophageal ganglion, the labral nerve, and thetrito-cerebral lobes and nerves, tr.l, tr.n. 564 BRAINS OF THREE GENERA OF ANTS CAROLINE BURLING THOMPSON PLATE 3 a. c-Tn.
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