JESimpson, 1938. 20±ft, Punta Cirio, 5 mi. s. Puerto Libertad, Sonora. April 27, 1938, continued. Saw 4 or 5 whales spouting ¼t mi. off shore; we saw them before at Puerto Lobos but not so close to shore. While setting my mousetraps in the sand dunes (among a bunch-grass(?) and occasional tortote) the sunset on the bay silhouetting the steep rock-sierias across the water — black and purple peaks above silver water — where many schools of sardines shimmered, the speckled sea-trout soon broke water in the midst of a large school 50 yards off shore; then blowing and swimming fast came a school of six porpoises — the sea- trout no longer broke water. The porpoise patoled a small area close to shore then for ten minutes? while I watched them (also the sunset and whales). I was quite certain that they (the porpoises) made a series of muffled grunts while under and at the surface of the water (not the blowing noise of breathing); however, I could get no confirmation of this from Señor Delgadillo or Dr. Benson or subsequent observations when light was good, and birds absent. We heard the grunts many times (at first thought to be sea-lions but none seen) when porpoises patrolling along beach (deep water 30' off shore) but could not be absolutely sure of the origin of the sound. (Tried fishing after dark, but no luck.) 61.