The paper describes Ctenophores of the Orders Cydippida, Lobata, and Cestida from the waters of Cook Strait. New Zealand. Three new species are described and figured. Pleurobrachia helicoides n. sp. has a cylindrical body; comb rows extending nearly the whole length of the body; paragastric canals as wide as the stomodeum; tentilla tightly coiled into a barrel-shaped orange-pink helix: Bolinopsis paragaster n. sp. has unique branched paragastric canals which unite with the subventral meridional canals on the margin of the oral lobe; double tentacle bases; Lesueuria pinnata n. sp. has four fin-like flaps, marginally papillose, beside the subventral meridional bands of swimming plates; oral lobes about ¼ the total body length. Bolinopsis, Lesueuria, Leucothea and Cestum are recorded from New Zealand waters for the first time.

The Ctenophores described in the present paper were collected by Mr. Kaberry, now of the Marine Department. Wellington, in the course of his postgraduate researches in the Department of Zoology at this College. They can be said to be fairly representative of the species found in New Zealand waters for the year July 1934 to July 1935. This season was exceptionally warm and calm in Wellington, and the absence of wind was important in the collection of delicate forms. Collections were made from Island Bay, a suburb of Wellington, bordering Cook Strait. Cook Strait forms a natural wind funnel between the North and South Islands of New Zealand and is on the line of the Subantarctic Convergence, and receives water from the East Australian Current and Southern Ocean Current during the summer months. These factors may have some effect on the abnormal distribution of typically warm water forms such as Cestum veneris. The authors wish to thank Prof. L. R. Richardson for his helpful advice with this paper.