[Fig. 10]. Reconstruction of visceral ganglia of Malletia. ×70.

[Fig. 11]. Section through cerebro-pleural mass of Malletia. The dorsal side is up. On the ventral side to the left and right are the beginnings of the lateral lobes or ganglionic cords which may represent the pleural ganglia. In this species the cerebral ganglia are not separated into right and left halves as in Nucula. ×300.

[Fig. 12]. Section through the central part of the pedal mass of Malletia. The dorsal side is up. ×300.

[Fig. 13]. Section through one visceral ganglion of Malletia. The dorsal side is up. ×300.