EN
Derogenes johnstoni Prudhoe et Bray, 1973 is redescribed based on newly collected specimens from notothenioid fishes from the Ross Sea. The species is distinguished from D. varicus (Müller, 1784) by larger eggs, 0.061-0.079 x 0.039-0.051 mm, with very thick shell, 0.005-0.007 mm wide, and a small knob at the anopercular pole. D. johnstoni seems to be common in Terra Nova Bay and probably in all subcontinental waters of the East Antarctic, while D. various (a cosmopolitan species) occurs commonly in the subantarctic and rarely at the South Shetland Islands.