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Volume 37, 1904
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Potamopyrgus corolla, Gould (1847).

Melania corolla, Gould, Proc. Bost. Soc. Nat. Hist., vol. ii., 1847, p. 223.

(1.) Lake Waikare (Stat. 19—From reeds).—One specimen, with black coating and six rounded whorls. Length, 5½ mm.; breadth, 3¾ mm.

(2.) Lake Taupo (Stat. 16 and 16F—Dredged in 280 ft. and 320 ft., muddy bottom).—Four specimens, all of which are

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shouldered and with traces of stout setæ; covered with a dark-brown coating; there are seven whorls, the peritreme is continuous. The dimensions range from 7 × 4½ mm. to 6½ × 4½ mm.

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