180 
part of its posterior margin is nearly straight; it is seen from the dorsal side, the frontal 
part of the head is turned backward, and the maxillipeds (g) forward; however, this 
position is an anomaly, no doubt produced by pressure acting on its very soft skin in the 
marsupium during its growth. — The head (fig. 1 a) without real lateral borders, and in 
the adults, the part surrounding the mouth-appendages is irregularly folded up against these 
appendages, or even overlapping the outer side of the maxillipeds. The antennule (a) almost 
rudimentary, as broad as long, 1-jointed, ending in several very short sete. Somewhat in 
front of the antennule are seen two taps (u), the nature of which is quite incomprehensible 
to me (possibly cones of viscous substance secreted through the orifices of glands?). The 
terminal margin of the basal joint of the maxillz is concave, rising at its posterior angle 
into a broad, rather short process. The maxillipeds have no spine at the distal inner angle 
of their penultimate joint. The lower side of the head naked all over. The list of the 
genital apertures forms about two thirds of an oval ring. 
MALE. It is small in proportion to the female (fig. 3d: fig. 3b). The specimen repre- 
sented in fig. 3h is 164mm. long, the one drawn in fig. 3g, measures 174mm. The body 
is not flattened. Seen from below, the head nearly equals the trunk in length, but the 
latter is somewhat thicker; seen sideways, the outline of the hair-coat runs from the base 
of the maxillipeds somewhat obliquely backward up across the side and the back, so that 
the dorsal line of the head becomes much longer than that of the trunk, and the short 
conical processes (x) are placed a little in front of the hair-covering. Seen from below, the 
lateral borders of the head converge from behind their centre up to a point in front of the 
base of the antennulee, so that the frontal border becomes very narrow; in proportion to its 
breadth it is considerably produced, and has a strongly curved, naked anterior margin. 
Antennule short, 2-jointed; second joint somewhat shorter as well as narrower than the first 
one, furnished with a few short sete. Maxille large; the terminal margin of the basal joint 
essentially as in the female. The basal joint of the maxillipeds has on its outside in the 
centre a fairly short, thick, rounded process, and distally a thick and very long, slightly 
curved process; the next joint (second and third fused together) has a larger or smaller 
outstanding process somewhat on the boundary between the anterior and the outer side. 
The lateral margin of the head is furnished with a row of fine, rather short hairs, and a 
similar row is seen somewhat outside the margin. The trunk is closely covered all over 
with very small transverse eminences, from each of which spring several short, fine hairs. 
— The frontal thread, if found, is long and of peculiar shape; in fig. 3h such a thread, 
lettered with an s, is shown as fixed to a marsupial plate (t); it is somewhat longer than 
the male, thin in the greater part of its length, then dilates pretty quickly and evenly 
towards its distal end, forms a collar-like ring, continues dilating, and forms a second ring 
at the thickest part of its expansion; beyond this ring it is still thick, though slowly de- 
creasing in circumference, and at last increases a little up to the distal end, by which it 
attaches itself. 
