Postlarval appendages and lantern rudiments.

Oral view representation of a postlarval juvenile after the regression of larval tissues. Ossicles of the lantern of Aristotle ossicles were present at the center of the oral region. Teeth (t), demipyramids (d), epiphyses (ep), and rotulae (r). Podia, spines, and sphaeridia are present on the calcified oral region (grey area). Dashed line delimits the second row of appendages positioned above the ambitus. Miliary spines not shown.