Ill 



division and having all the segments quite simple ; genital segment about the 

 length of the 2 succeeding segments combined and slightly dilated in front. 

 Caudal rami sublinear in form, being about 3 times as long as they are broad, 

 and scarcely at all divergent; apical setoe more or less curved outwards in their 

 distal part, the inner mediate one exceeding the tail in length. Anterior antennse 

 short and rather thick at the base, tapering distally, and composed of only 1 1 

 joints clothed with slender spreading setse, 1st, 2nd and 6th joints larger than 

 the others ; terminal part 3-articulate. Posterior antenna3 fully as long as the 

 anterior ones, and having the 2nd (basal) joint comparatively large and slightly 

 curved in the middle, terminal joint exceeding somewhat in size the preceding 

 one, and carrying on the blunted end 2 comparatively large spines of unequal 

 length and finely denticulated on the edges, these spines being moreover accom- 

 panied inside by a slender ciliated seta, and outside by a somewhat shorter 

 seta and a minute bristle; outer ramus somewhat longer than the terminal joint 

 and provided with a long apical seta and another much shorter lateral one. 

 Siphonal tube exceedingly long and slender, extending almost to the end of the 

 body. Maxillae with the outer lobe originating far in front and considerably 

 curved, carrying on the tip 3 moderately long plumose setse accompanied outside 

 by a minute bristle. Maxillipeds moderately strong, dactylus of the anterior ones 

 only slightly curved and imperfectly subdivided in the middle; basal part of the 

 posterior ones composed of 2 well-defined joints. Natatory legs with the spines 

 of the outer ramus narrow lancet-shaped; terminal joint of this ramus in 1st and 

 4th pairs with 3 setse inside; terminal joint of inner ramus in 3rd and 4th pair 

 with only a single spine on the tip. Last pair of legs with the distal joint 

 rather small, rounded oval in form, and carrying inside 2 short setse, outside 2 

 much longer setse attached close together to a distinct ledge and partly crossing 

 each other, and at the somewhat exserted tip another similar seta. Ovisacs 

 oblong in form, and closely appressed to the tail, each containing a rather 

 limited number of ova, in some cases only 4 arranged in a single row. 



Male considerably smaller than female, and exhibiting the usual sexual 

 differences. Anterior antennse composed of the same number of joints as in the 

 female, though their mutual relation is rather different; terminal part consisting 

 of only a single narrow lamellar joint; sesthetask issuing from the preceding 

 joint very largely developed. 



Colour (in female) generally light yellowish brown, with darker intestine 

 and ovarial tubes. 



Length of adult female about 1 mm. 



