222 Zoological Society. 



Chorinus acanthonotos. Adams and White, List of Crust, in Brit. 

 Mus., Appendix, p. 123. 



Carapace armed with four long spines, the two front ones rather 

 close together at their bases, and directed a little forwards ; the two 

 hinder bifid ; the forks of the anterior hinder spine diverging late- 

 rally, and those of the posterior divaricating longitudinally ; three 

 spines on each branchial region, the anterior pointed forward, flat- 

 tened horizontally ; the middle slender, curved backwards, upwards 

 and outwards, with two sharp-pointed tubercles at its base directed 

 downwards ; the posterior with two divaricating slender spines di- 

 rected 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 cur\'ed 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. 



This species diflfers 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 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. 



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 will be published 

 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 diflferent 

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

 rican type. 



Zebrida, White. 



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

 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 downwards ; the cornea of the eyes 

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

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

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



