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their length thev have a single, large, powerful suctorial disc. The c-, f- and g-bristles are
considera bly longer in the male than in the female; the b-bristle but slightlv lengthened in the former.
Second antenna: — The protopo dite has a medial-distal bristle.
Exopodite: The bristle of the second joint rather powerfully developed, unarmed. The
natatorv bristles on the third to ninth joints entirelv without spines. The last-mentioned joints
with or without basal spines. The endopodite developed in the males into a powerful
clasping organ with three joints. Besides the proximal-ventral bristle its end-joint has two
short distal bristles placed close together. In the females the endopodite is also comparativelv
well developed, extended, with three joints; the bristle of its end joint very long.
Man dible: — Protopodite: The endite of the coxale is weakly bifurca ted
distally; some of its spines are rather powerful, those on the medial and also some of those on
the lateral side arranged in very distinct groups. Apart from the bristle of the endite there
are no bristles on the coxale joint. Basale: Of the ventral bristles one d-bristle is very long,
furnished with numerous long secondary bristles and short-haired distally; the rest of these
bristles are of moderate length or short, most of them furnished only with short hairs. On
the dorsal side this joint has three bristles. Endopodite: The first joint has four bristles
ventrally. The anterior side of the second joint is very richly furnished with bristles. The
end joint armed with seven bristles, of which the medial of the two middle ones is longer than
the others and claw-shaped.
Maxilla: — Protopodite: The coxale has dorso-distally a single
long-fine-haired bristle. Proximally on the outside of the third masticatory process there is a single
bristle. At the boundary between the basale and the first endopodite joint there are in most
cases three bristles, one close to the exopodite, one at about the middle of the inside of the
endopodite and one at the anterior margin of the latter. The coxale has dorso-distally a rather
large, leaf-shaped epipodial appendage. The exopodite is comparativelv well
developed, with thick, long fine hairs; not displaced distallv. The endopodite is broad
and moderately long.
Sixth limb: — The second exopodite joint rather short, somewhat rounded,
and furnished with numerous bristles; the posterior-distal ones of the latter do not dominate
the others at all strikingly.
Seventh limb: — Fitted with very numerous cleaning bristles; a large number
of these are placed close together near the point of the limb, the rest spread irregularly along
the distal part of the limb; as to the position of the last-mentioned bristles it is to be noticed
that most often there is only one bristle on the same side of one and the same joint, two
bristles are, however, not infrequently found close to each other on the same joint. The end
comb consists of a very large number of teeth of moderate strength, all of about the same tvpe
and size. Dorsally close to the end comb the wall of this limb is not at all or only slightlv
thickened, forming merely a slight depression. There is no special muscle for compressing
the latter.
Furca: — The lamellae are short. The number of claws is about 10—lä. without
any clear division into main and secondary claws.
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