J86_ 



lamella pronouncedly spatulate in form, being contracted at the base and 

 gradually widening towards the extremity, which is broadly truncated. Lateral 

 lobes of the 3 succeeding segments rounded of the end. Last truncal segment 

 rather narrow. Tail exceeding half the length of the anterior division; genital 

 segment about as long as the 3 succeeding segments combined, and some- 

 what dilated in the middle; anal segment scarcely larger than the preceding 

 one. Caudal rami somewhat lamellar and oblong oval in form, exceeding in 

 length the anal segment, inner edge finely ciliated, outer edge with 2 suc- 

 cessive setae, the distal one apparently answering to the outer apical seta 

 in other forms, the somewhat narrowed extremity carrying 3 unequal setae 

 and a small dorsal bristle extending outwards. Eye wholly absent. Anterior 

 antennas shorter than the cephalon, and somewhat abruptly bent near the 

 middle, being composed of 7 well defined joints, the 2nd of which is much 

 the largest and densely clothed with unusually long and coarse, finely an- 

 nulated setae, the 5 outer joints much narrower than the first 2. Posterior 

 antennae exceeding in length the anterior and nearly nacked, being composed 

 of 5 well defined joints, the first of which is very short, the 2nd much the 

 largest, the 3rd about half as long and equal to the combined length of 

 the outer 2 joints; terminal joint armed on the tip with a comparatively short 

 uncinate claw accompanied by a small bristle, and having moreover 2 unequal 

 setae attached to a distinct ledge at some distance from the tip behind. 

 Natatory legs with the inner ramus a little longer than the outer, its terminal 

 joint comparatively large, fully as long as the other 2 combined, and ex- 

 hibiting a somewhat different armature in the several pairs, that of 1st pair 

 having one spine outside the tip, that of 2nd pair 3, that of 3rd pair 4, and 

 that of 4th pair 5 spines. Last pair of legs with the proximal joint rather 

 small and carrying outside the usual slender bristle; distal joint oblong 

 oval in form and finely ciliated on the proximal part of the inner edge, 

 being moreover provided with 3 slender marginal spines, one somewhat 

 beyond the middle of the outer edge, the other 2 on the obtusely rounded 

 extremity; between the latter a small bristle is attached. Ovisacs not very 

 large, oval in form, and closely appressed to the sides of the tail. 



Male somewhat smaller than female, and having the anterior division 

 of the body less broad. Genital segment considerably tumefied and terminating 

 on each side in a triangular lappet clothed with 2 setae and a small denticle. 

 Anterior antennae with 2 well-defined recurved asstethasks, the one attached to 

 the 2nd, the other to the 4th joint; the 3 outer joints wholly coalesced. 

 Posterior maxillipeds very powerfully developed, propodos with the outer edge 



