‘giuiills 
CRUSTACEA OF THE MERGUI ARCHIPELAGO. 93 
Stimpson, however, says in his description that the antenne 
are similar to those of Pilumnus; but perhaps he bas mistaken 
their real structure, as his specimens were very small. The 
species lately described and figured by Miers under the name 
of Pseudorhombila sulcatifrons, var. australiensis, is also closely 
- allied to this species; but it seems to differ by its longer and 
more slender dactylopodites, by the non-emarginate front, and 
the complete absence of hairs on the wrist (Miers, Zoology of 
the Voyage of H.M.S. ‘Alert,’ Crustacea, p. 242, pl. xxiv. 
fig. C). 
Should Plumnoplax sulcatifrons, Stimps., prove to be identical 
with Eucrate affinis, Hasw., I should then be inclined to retain 
the latter name, although of later date than the former, because 
in both species the anterior margin of the front is transversely 
sulcate. 
Genus Carcinopiax, M.-Edw. 
60. CarcrnoPLax sEToSuUS, A. M-Edw. 
Carcinoplax setosus, Alph. Milne-Edwards, Nouv. Arch. du Muséum 
Hist. Nat. t. ix. p. 267, pl. xu. fig. 2. 
Three specimens (one ¢, two 2) were collected at Owen 
island. 
The cepbalothorax of the largest individual is 73 millim. 
broad. 
This small species has been found on the shores of New Cale- 
donia and of the island of Banda (Leyden Museum). 
61. CaRCINOPLAX INTEGER, DMers. 
Carcinoplax integra, Miers, Report on the Zoological Collections made 
in the Indo-Pacific Ocean during the Ve of H.M.S. ‘Alert, 1884, 
p. 543, pl. xlvin. fig. C. 
Three specimens were collected at Elphinstone Island, two 
males and one female. 
Tam enabled to add some additional remarks to Miers’s descrip- 
tion of this species, as the Mergui specimens are of a much larger 
size than those he described. The cephalothorax of the largest 
specimen (¢ )is 103 millim. broad and 7? millim. long; unfortu- 
nately this specimen has lost both chelipedes. The specimen 
which was described by Miers was only half that size. The front 
is much deflexed, and divided by asmall median triangular incision 
into two lobes; the margins of these lobes are nearly straight 
