1. Onchidoris depressa. L. 4mm. Spicules, transverse on dorsum, oblique on subdorsum, radial on flanks. 6 longitudinal lines of spots on dorsum, and 3 concentric lines on flanks. Ring of unobtrusive yellowish white gills, with ring of brown spots within.
2. Onchidoris depressa. L. 4mm. Spicules, transverse on dorsum, oblique on subdorsum, radial on flanks. 6 longitudinal lines of spots on dorsum, and 3 concentric lines on flanks. Ring of unobtrusive yellowish white gills, with ring of brown spots within.

Onchidoris depressa. L. 4mm. Spicules, transverse on dorsum, oblique on subdorsum, radial on flanks. 6 longitudinal lines of spots on dorsum, and 3 concentric lines on flanks. Ring of unobtrusive yellowish white gills, with ring of brown spots within.