almost as abundantly—I have it from Rona Bay, Wellington Harbour, and also from Island Bay; and Messrs. Lucas and Hodgkin obtained specimens from Lake Waikare. Besides being found in fresh water, however, this species is also able to live in salt water. I have on different occasions taken it in great abundance in Otago Harbour in the ordinary sea-water, associated with the usual marine forms. I have also taken it at Island Bay, Wellington, in a pool near high-water mark, which would doubtless be filled with sea-water at particularly high tides, though the water was only slightly brackish at the time I collected the specimens.

Mr. Stebbing considers Pherusa australis, Haswell, to be a synonym of this species, and thinks that CEdicerus novi-zealandice, Dana, may perhaps also belong to it. I have, however, specimens that I think undoubtedly are to be referred to the latter species, and they belong to the CEdicerotidce, and are apparently the same as Carolobatea schneideri (Stebbing). I am dealing with them in my report on the Crustacea collected by the recent expedition to the subantarctic islands of New Zealand.