12 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMAEANG. 



bases, and directed a little forwards ; the two binder 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. 

 Hab. Eastern Seas ; Borneo (Unsang). 



This species differs from Chorinus aculeatus (Edwards, Hist. Nat. des Crust., vol. i. 

 p. 316, and De Haan's species, Fauna Japonica, Plate 23. 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, De Haan. 



Canthoruin margine superiore spinis elongatis armato, thorace in linea media spinis 6, tertiis et quartis 

 basi transversirn conjunctis ; spinis duabns in regionibus branchialibus ; omnibus cylindricis valde elongatis, 

 apice incrassatis, femoribus apice unispinosis, tarsis apice integris. 



Hab. 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 



