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Fig. 7 Dorsal view of ears plus hindbrain at 26 and 36 hpf, stained with islet-1 antibody using HRP detection, showing the statoacoustic ganglion (arrows) containing many more neurons in mib than in wild type. The outline of the right ear is indicated by a dotted line. The statoacoustic ganglion at early stages forms a continuous mass with the anterior lateral line ganglion and the VIIth cranial nerve ganglion. As a rough guide, however, one can take the statoacoustic ganglion cells to be those that lie at and posterior to the anterior end of the otocyst; we followed this rule in making the counts described in the text.