32 STALK- AND SESSILE-EYED CRUSTACEA 
The genus as thus characterized, excludes the species referred to it 
by M. A. Milne Edwards, having a carapace not broader than long, 
small hands, and an elongated acute lanceolate terminal joint to the fifth 
pair of legs, for which Dr. Leach’s prior name of Portumnus 1s 
retained. 
83. Platyonychus bipustulatus. 
Platyonychus bipustulatus, M. Edw. Hist. Nat. Crust. i, p. 437, pl. xvu, 
fiz. 7-10, (1834); Alph. M. Edw. Archiv. Mns. Hist. Nat. x, p. £13, 
(1861); Miers, Zool. Erebus and Terror, Crust. p. 2, pl. 1, fig. 1, 
(1874). 
Anisopus punctatus, De Haan, Faun. Japon, Crust. p. 44, pl. ii, fig. 1, 
(1835). 
Platyonychus purpureus, Dana, U.S. Explor. Exped. xii, Crust. 
part i, p. 291, pl. xviii, fig. 3, (1852). 
Portunus catharus, White, Dieffenb, New Zeal. ii, p. 265, (1848). 
Carapace nearly circular, very finely granulous. Regions scarcely 
defined. Latero-anterior margins regularly arched and divided into 
five teeth ; which are wide, and directed forwards. Front but shghtly 
prominent, with four small teeth; the middle ones more prominent 
than the lateral. Orbital margin divided into three lobes by two fissures, 
the median lobe spinous. Anterior legs of moderate length. Arm 
smooth. Wrist with a spine at its antero-internal angle. Hand 
strongly carinate, the carine granulous, with a small spine above the 
base of the mobile finger, on the inner side. Legs of the second pair 
very long and robust, especially in the male. Above the articulation 
the margin of the thigh is raised, and forms a crest. Tarsus falciform, 
and with the upper margin deeply channelled. Legs of the third and 
fourth pairs of ordinary shape. Swimming legs wide and thick, tarsus 
wide and rounded. Abdomen of male with seven distinct joints. 
Colour yellowish, with very close purple punctulations on the hinder 
part of the branchial and hepatic regions. Length 2} in. ; breadth 
2.7, (A; M. E.). 
New Zealand (Coll. Brit. Mus.). 
This species is found in the Australian, Indian, and Japanese Seas, 
and also on the Coast of Chili. 
Sub-Tribe I]J. CatomMEropa. 
Quadrilatera, Latr. (part) Fam. Nat. p. 269, (1825). 
Catometopes, M. Edw. Hist. Nat. Crust. i, p. 264, (1834). 
