119 
doubt has something to do with the strain caused by the attachment. As fig. 4a shows, 
the animal is almost symmetrical. 
The frontal margin is fringed with short, fine hairs (fig. 1a). The antennule are 
rather long, with very long terminal sete. The maxillulae with well developed additional 
branch. The maxillz and the maxillipeds normal, naked, the latter pair having all four 
joints distinctly separated, and the terminal joint ending in three or four points. The sub- 
median skeleton with a tolerably broad list near the maxille; a list between the head and 
the trunk which is not interrupted in its centre; no hairs whatever surrounding the base 
of the various appendages. The lateral margin of the head provided with a narrow stripe 
of rather short hairs. The trunk perfectly naked; trunk-legs very small, easily found in 
small specimens, but scarcely to be detected in large ones. ‘The genital area (fig. 1b) is 
narrower than the head and somewhat broader than long; its chitinised part forms a posteriorly 
somewhat concave, rather narrow ring, the anterior half of which is more feebly chitinised 
than the posterior part, or, as in fig. 1b, it is sometimes altogether wanting; the genital 
apertures are situated near each other and turn forward in an oblique direction. The caudal 
stylets are found close together on the chitinous ring quite near the genital apertures; at 
least in two adult specimens they were without setae — which may have been broken oft by 
the preparation, for they are found in small specimens (fig. 1 g and 1h). (Besides in fig. 1b 
are seen the orifices of the receptacula seminis, which are marked by a dotted line). Genital 
area and surroundings naked. 
MALE. A large specimen is ‘27 mm. in length. The body is somewhat elongate 
oval, the breadth being about one third shorter than the length, consequently it is of pretty 
good size in proportion to the female (fig. 4c : fig. 4a). The head is somewhat larger 
than the trunk (fig. 4h and 4i). The frontal border is rather produced, its margin evenly 
curved and naked. Antennule, antennsze, mouth, maxillule and maxille essentially as in 
the female (fig. 41 will give an idea of a strongly protruding rostrum and show the maxillula, 
with its additional branch proceeding from a kind of foot, and the antenna). The maxil- 
lipeds very long and slender, all joints well separated, the basal joint provided with a few 
hairy spots. The sub-median skeleton with all three pairs of processes; the first pair (at 
the base of the maxill) are blunt; the second pair which originate nearly at the anterior 
angle of the base of the maxillipeds, are long, turn backward and are distally somewhat 
curved, and between their posterior parts are found the third pair of processes, which are 
pointed, but not half the length of the second pair. The lateral margin of the head is 
provided with a stripe of moderately long hairs, and from its posterior end, which curves 
upward, the hair-covering is continued obliquely upward and somewhat backward across the 
side and back of the animal: behind this line, the back, the sides and the ventral surface 
of the ttunk are covered with hairs of medium length, yet on the back, somewhat behind the 
anterior limit of the hair-covering, we see a transverse area which is naked and rather 
short (at the median Jine); the anterior part of the ventral surface is also naked. The head 
