120 



long, flattened, close together at the base, gradually diverging. and 

 curved downwards. Orbitai 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 boiinded 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 thirdjoints, and diverging upwards and outwards. Tarsi long, 

 curved, and smooth below. Body covered with long thin hairs. 



This species difFers from Chorinus aculeatus (Edwards, Hist.Nat. des 

 Crust. i. p. 316, and De Haan, Fauna Japonica, pi. 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 orbit mušt 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. 



Inhabits Eastern Seas ; Borneo (Unsang). 



The above description was drawn up by Mr. Arthur Adams, As- 

 sistant-Surgeon to H. M. S. Samarang. A figure \vill be publishe<l 

 in the forthcoming illustrated •work on the zoological results of that 

 voyage, which in the orders MoUusca and Crustacea are particularly 

 striking. 



I may remark that the above species enters into Chorinus of Prof. 

 Edwards and Dr. De Haan, but seems to me to be very difFerent 

 from Chorinus of Leach, founded on a West Indian and South Ame- 

 rican type. 



Zebriha, White. 



Carapace flattened, and about as broad as long. Front horizontai, 

 slightly bent down, and formed of two flattened spines, conical, di- 

 rected forwards, and slightly diverging at their tips. The orbits 

 circular ; the peduncle of the eyes very large and thick, broader from 

 side to side than from above do\vnwards ; the cornea of the eyes 

 projecting beyond the outer margin of the front, nearly filling up the 

 orbitai cavities, the upper margins of which are salient. The latero- 

 anterior borders of the carapace armed with a single, strong, flattened 

 process ; conical, trenchant, broad at the base, their outer edges 

 slightly elevated, with their points curving forwards. The first joint 

 of the external antennae is very large, long, cylindrical, and the an- 

 tennse are covered by the rostrum. The epistome is very nearly 

 similar to that of Acanthonyx. The chelse, shorter than in that genus, 

 are armed with flattened, conical, slightly obtuse spines. The second 

 joint triangular, with an external and internal conical spine, the ex- 

 ternal very long and directed upwards and forvvards ; the third joint 

 armed with three spines ; one superior posterior, and directed for- 

 wards ; two anterior lateral, and directed outwards and rounded at 

 their extremities ; the fourth joint is crested with a sharp flattened 



