Chiltonia mihiwaka Stebbing, 1906, p. 555: Chilton, 1909A, p. 644; 1909B, p. 57.

This species was described from specimens obtained in streams on Mount Mihiwaka, near Port Chalmers, at heights up to about 1,000 ft. above sea-level. Later on Mr. G. M. Thomson collected it in similar localities on Mount Maungatua and other hills in the neighbourhood of Dunedin. During the expedition of the Philosophical Institute of Canterbury to the Subantarctic Islands of New Zealand in 1907, specimens were taken in fresh-water pools and streams on Enderby Island, Auckland Island, and Campbell Island, at places not far above sea-level. These specimens differed from the type in having the palm of the second gnathopod in the male oblique instead of transverse, and prove to be the same as C. subtenuis Sayce, a species found in New South Wales, Victoria, and Western Australia.

In December, 1922, I found two specimens, male and female, in coitu, in a small fresh-water stream at Riverton, Southland, just about high-water mark. It was low tide at the time, and the water in which the animals were living was quite fresh, but the sea-water would reach the place at high tide. Both specimens were deeply pigmented of a dark-grey colour, while the Port Chalmers specimens are usually much lighter, some being almost white. The Riverton specimens resemble those from Mount Mihiwaka so much that they must be considered as belonging to the same species, but there are some slight differences. The second gnathopod of the male (fig. 1)^* has the palm quite transverse, and the dactyl has a rounded