168 from the first hump to the flukes the section of median ridge is a straight slight broken by swelling and a second "hump" just in front of flukes, which is as large as the first hump. Post. eye injured Flakes Throat creases The creases are very short or irregular and sometimes frequently- They occupy a space from the branch- ing of the mandibles to about one foot behind corners of mouth. They are only in the central portion on either side of the median "keel" and do not extend to corners of mouth. Blowhole The blowhole is situated in the center of a prominent ridge or swelling which rises abruptly on the left side of the head near the extremity, the ant- erior end of the blowhole is just 13 inches behind a line drawn across from the extremity of the head. Below the swelling of the blowhole on the left extremity of the head is a broad shallow but well marked depression which runs from the extremity of the head to about opposite the posterior end of the blowhole where it broadens out at its last. The thick upper wall