12 ZOOLOGY OP THE VOYAGE OP H.M.S. SAHARAN G. 
bases, and directed a little forwards; the two hinder bifid; the forks of the -anterior hinder 
spines diverging laterally, and those of the posterior divaricating longitudinally, three spines 
on each branchial region, the anterior pointed forwards, flattened horizontally, the middle 
slender, curved backwards, upwards, and outwards, with two divaricating, slender spines, 
directed backwards, outwards, and upwards. Horns of the rostrum long, flattened, close 
together at the base, gradually diverging and curved downwards. Orbital margin armed 
at its superior part with a long bifid spine, on the anterior part having a short bifid spine, 
and on the posterior part bounded by a short spine, curved forwards. Inferior margin of 
the orbit nearly wanting, and its external angle ending in a short, sharp, tooth-like process. 
The first pair of legs armed both above and below with a trenchant, denticulated crest, the 
other legs cylindrical and furnished with two long, sharp-pointed spines, situated one on each 
side of the upper part of the extremity of the third joints, and diverging upwards and 
outwards ; tarsi long, curved, and smooth below. Body covered with long, thin hairs. 
Ha is. Eastern Seas ; Borneo (Unsang). 
This species differs from Chorinus aculeatus (Edwards, Hist. Nat. des Crust., vol. i. 
p. 31G, and De Haan’s species, Fauna Japonica, Plate 28. fig. 2.), in the length and position 
of the spines, which are not tipped with a knob, but sharp-pointed, and in the thin joints 
of the posterior pairs of legs being armed with two spines. The peculiarity of the long bifid 
spine above the old orbit must also be regarded as a singular characteristic, the front legs are 
more slender, the horns of the rostrum are longer and less divaricating than in C. aculeatus. 
The species described above enters into Chorinus of Professor Edwards and Dr. De Haan, 
but it seems to be very different from Chorinus of Leach, founded on a West Indian and 
South American type. 
The Chorinus, like the species of Mithrax, inhabit deep water, and always seem to prefer 
those localities where the bottom is covered with weeds ; they are very inactive in their move- 
ments, and become rigid in all their limbs when first captured, but make no defence with 
their forelegs. One specimen was obtained by the dredge, entangled in a mass of corallines, 
and the C. longispina was procured from a coral bottom near the great Loo-Choo. 
2. CHORINUS LONGISPINA, Be Haan. 
Canthorum margine superiore spinis elongatis armato, thorace in linea media spinis 6, tertiis et quartis 
basi transversim conjunctis ; spinis duabus in regionibus branchialibus ; omnibus cylindricis valde elongatis, 
apice incrassatis, femoribus apice unispinosis, tarsis apice intcgris. 
IIab. Maria Orientalia. 
Chorinus longispina, De Haan, Faun. Japon. p. 94. t. 23. f. 2. 
The superior margin of the orbits armed with elongated spines, six spines in the middle 
line of the thorax, the third and fourth transversely joined at the base, two spines on the 
