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. la). The antennulge are 

 rather long, with very long terminal setae. The maxillulae with well developed additional 

 branch. The maxillae 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 maxillae; 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. lb) 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. lb, 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 off by 

 the preparation, for they are found in small specimens (fig. 1 g and 1 h). (Besides in fig. 1 b 

 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. 4 c : fig. 4 a). 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, antennae, mouth, maxillulae and maxillae essentially as in 

 flie 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 maxillae) 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 trunk 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 line) ; the anterior part of the ventral surface is also naked. The head 



