CRUSTACEA OF THE MERGUI ARCHIPELAGO. 217 
posterior border is more or less spinulose along its whole length, 
but in most specimens only three or four of the distal spines 
are more distinctly developed. The outer surface of the hands 
is rather depressed and covered with minute granules, often 
arranged in very short transverse or oblique lines, especially 
near the upper margin, similar to those of the upper surface of 
the carpopodite. When examined under a strong magnifying- 
glass, these minute granules appear to be provided anteriorly 
with microscopical hairs. The fingers are shorter than the palm, 
and are not hairy along their inner surfaces. 
The ambulatory legs are a little hairy. The anterior margin 
of the meropodites is unarmed, but one or two small teeth are 
observed at the distal ends of the posterior margins of the mero- 
podites of the second and third pair of legs, those of the fourth 
pair having the posterior margins unarmed. 
Dimensions of our largest specimen :— 
millim. 
Weneth of ceplalothorax ..........---0+.++: 113 
Hoe AMG MMOle SAMAC penis sha eel g al Siar wei Soke oe os ne mt 
IFES CMTON CATPOPOGILE i... soe. sc ese esse ne 9 
TOWERS) CL OE NATO Se eee ea er er ewer ae 18 
The largest specimen observed by Heller had the carapace 
14 millim, long. 
Porcellana dentata, M.-Edw., has been observed at the Nicobar 
Islands (Heller), on the coast of Java (Afilne-Edwards), and on 
the shores of North and North-eastern Australia, appearing thus 
to inhabit the Malaysian Archipelago and the neighbouring 
seas. 
123. Porcettana Bosc, Aud. 
Porcellana Boscii, Audouin, Savigny, Description de s+ gypte, Crust. 
pli yu. fig. 2: 
Porcellana Boscii, Heller, Sitzungsber. der Wiener Akad. der Wissensch. 
Bd. xliv. p. 256. 
Petrolisthes Boscii, Kossmann, Zoolog. Ergebnisse einer Reise nach 
dem Rothen Meeres, ii. Halfte, 1° Lief. p. 74. 
Porcellana Boscii, de Man, in Notes from the Leyden Museum, vol. iii. 
p- 104. 
Porcellana rugosa, Milne-Edwards, Hist. Nat. des Crustacés, t. ii. 
p. 252. 
Fifteen specimens were captured at Elphinstone Island Bay, 
and one in King Island Bay. 
