Three recently found skulls of Delphinus tropicalis are discussed and compared with other skulls of the same taxon. The occurrence of Delphinus delphis in the same area as Delphinus tropicalis makes it plausible that D. tropicalis is a distinct species and not a subspecies of D. delphis. A dolphin collected in the South China Sea, probably near Pontianak, by W. L. Abbott in 1907 also belongs to Delphinus tropicalis. The species therefore has a wider distribution than was originally believed.