Patch is distinct, P. dalli presents so much coloration. 4. The anterior of the posterior half of the body of our specimen is totally unlike that of P. dalli, in fact is unlike that of any other porpoise with which I am familiar. The upper lower edges of the foremule are not particularly "flange like" as in P. dalli. The edges are sharp above but not below. They gradually to the upper edge. This body is apparently thicker than in P. dalli. Description: Color entire: Head, back and upper sides black. A white area occupies the lower sides, forearm (except ventral). This white area extends forward to a point slightly beyond the anterior insertion of the pectoral fins. In the central part of the body the superior edge of the white area is almost straight; anteriorly the end is rounded, the lower anterior edge extending back down obliquely running on to the breast a little behind the posterior insertion of the fins. Posteriorly, between the fins the black of the throat extends backward in a the narrow band on the ventral.