134 center of the ventral surface, becoming gradually wider as it goes forward until slightly beyond the anterior insertion of the pectorals it spreads out into a somewhat shaped purplish gray area. The anterior end of this area is notched in the center & has rounded corners. It is 4-50 mil. from the tip of the upper jaws (a little behind due to corners of mouth). Directly between the pectorals before this line spreads out it is 16 mil wide. The purplish gray area joins the navel to its anterior end is 1/68 cent. long. From the navel a less clearly defined, but wider, purplish gray based extends backward broadening gradually until at penis it is 140 mil wide. It narrows a little between penist anus, then widens again slightly, & runs abruptly into the anal opening + is lost. There is no indication of lighter color on the ventral surface behind the anus except the spot below the flexor musculi already referred to. The outer layer of the epidermis is as thick as that of a Megaptera.