4 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMARANG. 
setis, ex ordme dispositis ; brachio trigono; carpo supra convexo et extrorsum curvato; manu extra con- 
vexa, intra concava, introrsum curvata, supra et infra obtusaj unguibus introrsuru inclinatis, deorsum 
curvatis, longioribus, compressis, margine inferiore ad basin sinuato ; marginibus utrisque minutim denticulatis • 
uno rnajore dente ad utriusque basin. ’ 
Primo pari pedum posteriorum admodum graciJi et elongato, quintuple et dimidio thorace longiore • 
seeundo pan vix tantA longitudine; femoribus cylindricis paululum tomentosis, serie setarum curvarum in 
parte posteriore; tibiis tertia parte longitudiuis femorum, parte anteriore setis incurvatis obsita- tarsis 
femora longitudine aequantibus compluribus breviusculis setis, inter quas set® majores spars® inverduntur • 
unguibus setis perlongis, tenuibus, gracilibus coopertis. Abdomine in femina sex-articulato. 
Hab. Maria Orientalia (littus Mindanaum). 
Ventricular and cardiac region convex, bitubercular, peduncles of the eyes with one spine. 
Carapace trigonal, convex above, lateral regions rather wider than that of the middle 
region, carapace narrowed at the sides behind the eyes, a tubercular, rather prominent spine 
on the antero-lateral part of the carapace, two strong and large tubercles, in the middle line, 
on the upper surface of the carapace, which is, moreover, covered with minute granular 
tubercles, and long, thin, scattered hairs. 
Front not quite extending as far as the end of the second joint of the external antennae, 
deeply grooved between the orbits, in the middle line, and with a strong longitudinal ridge on 
each side: apex truncated, horizontal, slightly emarginated in the middle, with the two 
lateral, terminal, slightly-developed lobes, tufted with numerous straight and stiff setae ; orbits 
entire, arched at the upper part, and slightly projecting; peduncles of the eyes protruding 
laterally considerably beyond the orbits, with a rather long and sharpened spine situated on 
the anterior part ; external antennae scarcely half as long as the carapace. 
Fore-lep one and a half times the length of the thorax, with the outer and inner edges 
fringed with long, stiff, curved hairs very regularly disposed ; third joint trigonal ; fourth joint 
convex above, and bent outwards ; fifth joint convex externally, concave internally, curved 
inwards, obtuse above and below, claws bent inwards, curved downwards, rather long, com- 
pressed, inferior edge sinuated near the base, both edges finely denticulated, each with one 
larger tooth near the base. 
First pair of hinder legs very slender, much elongated, five times and a half the length 
of the carapace, second pair of posterior legs hardly as long, femora cylindrical, slightly 
tomentose, with a row of curved hairs on the posterior part ; tibiae a third of the length of 
the femora, the anterior part beset with incurved hairs, tarsi as long as the femora, with 
numerous rather short hairs, and having longer hairs scattered among them ; claws covered 
with very long, fine, slender hairs. Abdomen, in the female, six-jointed. 
Hab. Eastern Seas (Shores of Mindanao). 
This species comes very near Inachus (. Ac/ueus ) Japonicus of De Haan, Faun. Japon. 
p. 99. t. xxix. f. 3, but the middle region has two strongly-marked tubercles, and the peduncles 
of the eyes have but one spine instead of four. The legs are also much longer in proportion 
than in A. Japonicus. 
