Fig. 6. Anatomy of the prow of the odontophore. (A) External anatomy, anterior view. (B) External anatomy, lateral view. (C) External anatomy, dorsal view. The prow shown in these views was approximately 4 mm in medio-lateral length, 8 mm in dorso-ventral length and 4 mm in antero-posterior length. (D) Internal muscle fibers of the prow. The view is posterior, looking at the inside of the antero-medial surface of the prow.