Daption Stephens, Gen. Zool. (Shaw), xiii, (1) p. 239 (1826).
Type by orig. desig., Procellaria capensis Linn.
In this genus the bill is short and stout, the gonys angulate near the end and the extremity inclined upwards; the nostrils are divided within the tube but terminate in a single orifice; the tarsus is slender, somewhat compressed, shorter than the middle toe and claw and reticulated throughout; the hind claw is strong; the tail of fourteen feathers is rather short and rounded at the end; the wings are long, with short secondaries and the first primary longest.