CRUSTACEA. 293 
lies before me. This species may be easily distinguished by 
the less slender chelipedes. The wrist (Fig. 1) is not so 
slender: that of the larger leg is 11 millim. long and 4!/, 
millim. broad. Its anterior margin is always armed with 
three teeth, that are more acute and more prominent than 
those of Petrol. Tenkatei. The chelae (Fig. 1) are broa- 
der in proportion to their length, the larger chela 
is namely 22 millim. long and 9 millim. broad, whereas 
the larger chela of Petrol. Tenkatei is 18 millim. long and 
6 millim. broad. The outer border of the chelae is more- 
over more arcuate and the fingers of both chelipedes 
are hairy on their inner borders. 
The anterior margin finally of the carpopodites of the 
anterior legs of Petrol. japonicus de Haan bears only one 
or at most two teeth, a second tooth is observed in 
this species preceding the distal tooth at the posterior margin 
of these joints and the anterior border of the meropodites 
of the ambulatory legs is quite unarmed. 
14. Petrolisthes indicus n. sp. 
Plate 7, fig. 3. 
One single male was collected at Endeh, Flores. 
This handsome species is most closely allied to Petrol. 
mossambicus Hilgendorf (Monatsberichte Kön. Akad. der 
Wissenschaften zu Berlin, 1878, p. 825, Pl. II, fig. 6), 
which inhabits the coast of Mocambique, and it represents 
the latter in the Malay Archipelago. 
The cephalothorax is 5%, millim. long and exactly as 
broad and presents the same form as that of Petrol. mos- 
sambicus. The front, however, has a different shape. It is 
much prominent, but it is very narrow and separa- 
ted by deep lateral emarginations from the in- 
ternal angles of the orbits that are blunt and 
obtuse, The lateral margins of the front are somewhat 
elevated and separated from one another by a deep mesial 
furrow, that divides itself, as usual, immediately behind 
Notes from the Leyden Museum, Vol. XV. 
