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Volume 7, 1874
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Art. XL.—Description of two new Species of Crustacea from New Zealand.

[Read before the Otago Institute, 12th October, 1874.]

Sesarma pentagona.

Carapace subquadrate, smooth, broader than long; anterior lateral margin with two teeth; front nearly vertical with four rounded projections; lateral regions obliquely striated; a pentagonal mark in the centre, the apex prolonged to the front, which it divides. Area on each side of the mouth below with moniliform transverse striæ. Arms trigonal, striated on the outside; hands smooth outside, and with a few scattered granules inside; fingers smooth. Legs with the third joint very broad, compressed, acute above, and armed with a single tooth at the apex, smooth; outer joints and claws tomentose.

Length, .67 inch; ratio of length to breadth, 1/1.27.

A single specimen in the Colonial Museum, Wellington.

Locality not stated.

Palinurus edwardsii.

Male.—Carapace beaked, armed with spines and large oval depressed tubercles separated by rows of short hairs. Beak small, compressed, curved

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upwards, and with two small spines at its base. Spines on each side of the beak compressed and smooth. Abdomen transversely sulcated, and covered with flat tubercles, each segment with a row of short hairs on its posterior margin. A single tooth on the posterior margin of the lateral lobes of the abdominal segments. Anterior legs with a strong spine on the inferior margin of the second and third joints; none on the penultimate joint. The superior margin of the distal extremity of the third joint of the last four pairs of legs armed with two spines, a smaller one in front of the larger.

Length from beak to end of telson, 9.5 inches.

Colour.—Carapace dark brownish-purple; abdomen the same, marbled with yellow; legs and caudal appendages reddish orange, more or less marked with purple.

In the female there is a spine on the inferior margin of the distal extremity of the penultimate joint of the last pair of legs.

Locality—Otago Heads. Common.

This species differs fromP. lalandii in its much smaller size, in the shape of the beak, in having no spine on the penultimate joint of the anterior legs, and in having a second small spine at the distal extremity of the third joint of the last four pairs of legs. I have named it in honour of M. Alphonse Milne-Edwards, who has done so much to increase our knowledge of New Zealand carcinology.