52 
THE YOYAGE OF H.M.S. CHALLENGER. 
the basal joint moderately enlarged, and armed (in the species I have examined) with 
a laterally projecting spine at the antero-external angle, and sometimes with another on 
the outer margin at the base ; the flagellum is shut off from the orbital cavity by the union 
of the basal joint with the front, and is partially visible from above at the sides of the 
rostrum. Merus of the exterior maxillipedes with the antero-external angle rounded 
and little produced ; the antero-internal angle, where the next joint articulates, slightly 
emarginate. Chelipedes (in the male) moderately developed, with the wrist carinated 
above and on the outer surface ; palm compressed and often carinated above ; fingers 
acute, denticulated on the inner margins, with a small interspace at base when closed. 
Ambulatory legs slender and of moderate length, or somewhat elongated ; merus-joints 
with one (or two) spines at the distal extremity ; dactyli nearly straight. 
The genus thus characterised includes not only the type, Chlorinoides tenuirostris, 
Haswell, but also certain species which have been referred to Paramithrax, to Chorinus, 
and to Acanthophrys. It may indeed almost be regarded, as I have considered it else- 
where, 1 as a subgenus of Paramithrax , from which it is only distinguished by the well- 
developed prseocular spine, the laterally projecting spine at the antero-external angle of 
the basal antennal joint, and the spinose merus-joints of the ambulatory legs. From 
Acanthophrys , A. Milne Edwards, to which it is also very nearly related, it is apparently 
distinguished, if Acanthophrys cristimanus be regarded as the type of Acanthophrys, by 
the emarginate antero-internal angle of the merus of the exterior maxillipedes, and by 
the spinose merus-joints of the ambulatory legs. If, however, Acanthophrys aculeatus 
be regarded as the type, Chlorinoides must be regarded as synonymous with 
Acanthophrys. 
The following species are apparently referable to this genus ; all occurring in the 
Indian, Malaysian, Japanese, or Chinese Seas, and in rather shallow water (to 38 
fathoms) except Chlorinoides longispinus, de Haan ; of this species I have described a 
variety, bituber culatus, from the Providence and Amirante group, in the Mascarene sub- 
region (in 19 to 22 fathoms). 
Chlorinoides tenuirostris, Haswell (type). Torres Strait, Darnley Island. 
Chlorinoides spatulifer ( Paramithrax spatulifer , Haswell). Port Stephens (5 
fathoms). 
Chlorinoides coppingeri (. Paramithrax coppingeri, Haswell). North Australia 
(12 to 17 fathoms) ; East Australia, Moreton Bay, Bass Strait (38 fathoms); 
Indian Ocean (A. Milne Edwards as Acanthophrys aculeatus). This species 
is possibly a variety of Chlorinoides longispinus, de Haan. 
1 Chlorinoides filholi {Acanthophrys jilholi, A. Milne Edwards). Stewart Island. 
(The basal antennal joint and ambulatory legs are not described in this species.) 
1 Crust. Rep. Zool. Coll. H.M.S. “ Alert,” p. 192, 1884. 
