143 



maxillipeds. AntennulaB scarcely of medium length, with set* of medium length. Antenms 

 3-jointed, first joint short, the third longer than the second, but shorter than the seta. Mouth 

 rather large, with mouth-border of medium breadth. Basal joint of the raaxillse smooth. Ma- 

 xillipeds middle-sized, proximal part of the basal joint with some transverse lines of short, fine 

 hairs on their anterior side; second and third joints separated, the last joint ending digitated in 

 four or five points. Sub-median skeleton very powerful, naked, with a double list between head 

 and trunk somewhat behind the base of the maxillipeds. Lateral margin of the head has a 

 tolerably broad longitudinal belt of short and fine hairs. Trunk naked; trunk-legs normal. 

 Genital area (fig. 6i) much narrower than the head: the solid chitine really consists of two 

 halves, each of them forming an oblique, irregular arch, which begins witliin the genital 

 aperture a little behind the anterior angle of its lips, whence it continues very close to the 

 lips, following their direction to the posterior angle, then advancing forward and outward 

 in an oblique line; its anterior extremity curving a little inward; the two arches connected 

 between the genital apertiu^es are strongly curved and placed at a pretty considerable 

 distance from each other. The caudal stylets are somewhat apart and comparatively far 

 from the genital area; their setae have no doubt fallen off. The skin between the genital 

 apertiu-es is closely covered with very short and fine hairs, which also extend somewhat 

 farther backward, though not nearly as far as to the caudal stylets; besides, a tolerably 

 large part of the chitinous arches — not their anterior part, however, — is furnished with 

 fine hairs. 



MALE. It is large in proportion to the female (fig. 1 b : fig. 1 a) , indeed quite ex- 

 ceptionally so, namely -69 mm. long and -53 mm. broad. The head occupies only between a 

 tldrd and a fourth of the whole body, consequently it is very short and also narrow, compared 

 with the large trunk (fig. 6a — 6b). The frontal border somewhat produced; the margin 

 evenly curved, without cup, naked. Setae of the antennulae tolerably long. Antennae (fig. 6 c) 

 seem to be 4-jointed; the basal joint short and coalescent with the skeleton of the head; 

 the connective membrane between the third and fourth joints is long, the terminal seta very 

 long, yet somewhat shorter than the antenna, with a transverse division not very far from 

 the base. Mouth as in the female. Maxillulae (fig. 6d) with two long principal branches, 

 the anterior one the longest, and at the base of it an extra branch of about half of its 

 length; the additional branch (e') is long, and its basal part forms a pretty thick, articulated 

 foot. Maxillae as in the female. Maxillipeds tolerably long; basal joint powerful, its 

 inner margin armed with a pair of rather shoi't, pointed processes (fig. 6e); its anterior 

 surface is decorated in a peculiar way by scattered areas covered with long hairs alternating 

 with partly large groups of very small, transverse eminences supplied with very short haii's; 

 its other sides are decorated in a more or less similar way; second and third joints separated; 

 the terminal joint ending in at least a couple of points. The first pair- of processes of the 

 sub-median skeleton short and blunt, the second pair- long and projecting straight backward; 



