Fig. (3) Diagrams of M. japanica brain in a rostrocaudal sequence based on selected transverse sections cut at 0.9 cm intervals. Certain brain regions were labeled for orientation. asb – area superficialis basalis; Aur – auricula cerebelli; Cer – cerebellum; ch opt – chiasma opticum; flm – fasciculus longitudinalis medialis; hypoph – hypophysis; lih – lobus inferior hypothalami; lobX – lobus vagi; N – nucleus N; Nflm – nucleus fasciculi longitudinalis medialis; nII – nervus opticus; Pd – pallium dorsale; Pdc – pallium dorsale (centrale); Pl – pallium laterale; P2 – pallial area 2; Rai – nucleus raphes inferior; SP3 – subpallial area 3; tect – tectum opticum; Oli – oliva inferior; vimp – ventriculus impar; vl – ventriculus lateralis; vma – velum medullare anterius; Xm – nucleus motorius nervi vagi.