REPORT ON THE BRACHYURA. 
249 
armed with one or two larger lobes or teeth, and distally acute or somewhat excavated. 
Ambulatory legs somewhat elongated, robust, with the merus-joints compressed, and 
usually armed with a subdistal spine on the superior margin ; dactyli slender, nearly 
straight, and styliform. 
The described species of this genus are numerous and occur in the littoral or shallow 
waters of all parts of the Indo-Pacific region. 
The following are recent forms which have been described since the publication of 
Milne Edwards’s memoir in 1852. They apparently all belong to his second section (§ 2) 
of the genus. 
Macrophthcdmus dentatus, Stimpson. Hong Kong. 
Macrophthcdmus convexus, Stimpson. Loo-Choo. 
Macrophthalmus bicarinatus, Heller. Nicobars. 
Macroplithalmus grandidieri , A. Milne Edwards. Zanzibar. 
Macrophthcdmus inermis, A. Milne Edwards. Sandwich Islands ; New 
Caledonia. 
Macrophthalmus Isevis, A. Milne Edwards. Indian Ocean. 
Macrophthcdmus grsejfei , A. Milne Edwards. Upolu, Samoan Islands. 
Macrophthalmus qucidratus, A. Milne Edwards. New Caledonia. 
Macrophthcdmus punctidatus, Miers. New South Wales, Port Jackson. 
Macrophthcdmus latifrons , Haswell. Victoria, Port Philip. 1 
Macrophthcdmus poclophthcdmus, Eydoux and Souleyet. 
Macrophthalmus podophthalmus, Eydoux and Souleyet, Crust, in Voy. d. “Bonite,” Zool., vol. i. 
pi. iii. fig. 6, 1841. 
,, ,, Milne Edwards, Ann. d. Sci. Nat., ser. 3, Zool., vol. xviii. p. 
155, 1852. 
Torres Strait, August 1874 (a small male). 
A young female of very small size from the Arafura Sea (depth not stated), 
may perhaps be regarded as the young of this species, although in the length of 
the ambulatory legs it approaches Macrophthcdmus sulcatus, as described by Milne 
Edwards, 2 from the Mauritius. In this specimen the ocular peduncles project beyond 
the antero-lateral angles of the carapace by little more than the length of their cornese ; 
the carapace is less widely transverse than in the adult Macrophthalmus podophthalmus , 
1 Macrophthalmus brevis (Herbst), from the Red Sea and Zanzibar, which Milne Edwards and Hilgendorf placed 
(the former doubtfully) as synonymous with Macrophthalmus carinimanus, Latreille, is regarded by M. de Man (Notes 
Leyden Mus., vol. ii. p. 70, 1879) as distinct from that species ; Macrophthalmus polleni, Hoffmann, from Sakatia 
Island, is thought by the same author to be synonymous with Macrophthalmus latreillei, Desmarest, which has been 
recorded both as a recent and fossil species. 
2 Tom. cit., p. 156, 1852. 
(zool. chall. EXP. — PART XLIX. 1886.) 
Ccc 32 
