Akaroa and Lyttelton obtained years ago, and provisionally labelled as an undescribed species of Eurystheus. Stebbing in 1899 placed the species under Wyvillea, a genus of doubtful validity, and retained it in the same position in 1906. The species is, however, quite evidently a Eurystheus and comes near to E. dentifer (Haswell); the third side plate in the male is produced anteriorly below that of the second gnathopod in the same way as described for Paranaenia typica Chilton (1884, p. 259), a species which Stebbing considers a synonym of Eurystheus dentifer (Haswell).

In addition to the Bay of Islands specimens I have others of E. haswelli from Lyttelton; Akaroa; Longbeach, near Otago Harbour; Stewart Island; Chatham Islands; and also one from Port Jackson, New South, Wales, sent to me in 1918 by Professor W. A. Haswell.