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Volume 44, 1911
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Haliacris neozelanica (Chilton).

Munna neozelanica Chilton, Ann. & Mag. Nat. Hist., ser. 6, vol. 9, p. 1, pl. 1 and 2, 1892. Haliacris neozelanica Chilton, Subant. Islands N.Z., p. 650, 1909.

A number of specimens that appear to belong to this species were taken at Waikawa Bay, in Queen Charlotte Sound, near Picton, in July, 1910. They were found in considerable numbers creeping on the under-surface of stones in a fresh-water stream at a point a little above high-water mark, the water at that place being at the time quite fresh, though it would be probably more or less influenced by high tides. The animals were all very small, and I have not been able to find one having the characteristic development of the first pair of legs of the adult male; but, so far as can be seen, the specimens are not structurally different from those gathered at the type locality in Port Chalmers, though they have the body rather darker in colour.

One similar specimen was also taken at Portage, on Kenepuru Sound, also at the mouth of a small stream, and in both cases specimens of Phreatogammarus propinquus were taken at the same time and place. Many years ago I collected one or two specimens in a similar situation at Waitati Estuary, Otago, but they were so minute that an exact identification at the time was impossible.

Structurally these fresh-water or brackish-water specimens do not seem to differ from the typically marine form, but there seems not much

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doubt that they do differ considerably in habit, and perhaps should be looked upon as a special variety. All the specimens found were quite small, not more than 2 mm. in length, and it is, of course, possible that only the young stage is passed through in the stream, and that as the animals become older they take to the sea.