The left pectoral has & bundles on the thick anterior margin - the right pectoral has seven. The first bundle is larger in all species - these bundles are all thickly encrusted with barnacles & infested by Oyamus... The posterior margin is thin (about 1 inch thick) & roughed - it is only slightly crenulated, par- ticularly toward the tips - the tips of both pectorals are absolutely covered with barnacles. External Characters The roof of the mouth is about six inches wide at the tip between the plates of a balance of flat on either side of the median line and two large folds - the ant end & these folds are lined longitudinally with fine creases - passing toward the sternum the median line of the roof of the mouth begins to raise in a gradual slope till at its posterior termination it ends in a ridge 1 & inches high - Going backwards the distance between the bases of the balance rows becomes greater & the