A Rare Porpoise of the South Atlantic, Phocaena dioptrica (Lahille, 1912)

Pp. 8; 2 full page photo-plates. Publisher’s original printed gray wrappers, lg 4to (12 1/2 x 9 1/2 inches). Discovery Reports volume 21. The Spectacled Porpoise (Phocoena dioptrica) is a rarely seen member of the porpoise family. The species is readily distinguished from other porpoises by a characteristic dark ring around the eyes. It range is restricted to the circumpolar region in cool sub-Antarctic and low Antarctic waters. No ownership marks.