222 Zoological Society. 
Chorinus acanthonotus, 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 longitudinalh'' ; 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 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. 
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 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 Mollusca 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. 
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 
