■14 PROCEEDINGS OP THE NATIONAL MUSEUM vol.72 



Peraeon, first segment slightly longer than the othei-s which are 

 subequal. Epimera rather undeveloped. The posterior margin of 

 the first segment straight, the margins of the second and third 

 slightly concave and those of the fourth to the seventh increasingly 

 concave ; postero-lateral angles broadly rounded in the first, slightly 

 produced in the second to the fourth, and more and more acutely 

 produced in the following segments, those of the seventh segment 

 reaching as far as the posterior margin of the third segment of 

 pleon. 



The central parts of all the segments bear two transverse rows of 

 rounded tubercles, one of which is close to the posterior margin. 

 In the first segment the two rows are somewhat irregularly arranged, 

 indicating a third row. On the epimera there is a single row of 

 tubercles or, particularly on the last segments, rather an irregular 

 ridge running obliquely outwards and backwards in the direction 

 of the postero-lateral angle. 



Legs somewhat increasing in length backwards, though all rather 

 short. Basis nearly twice the length of the ischium, which is slightly 

 expanded distally and one and a half times the length of the merus. 

 The merus and the carpus are about subequal in length. The pro- 

 podus is a little longer than either of the two preceding joints but 

 considerably narrower. The dactylus is moderately stout and has the 

 basal portion thickly covered with setae which are longer in the 

 male than in the female and one of which is always much longer than 

 the others. The terminal portion of the dactylus forms a rather 

 slender claw, on the outside of the base of which in the male arises 

 a long well developed seta having a slight club-like swelling toward 

 its extremity, and arising from its side a delicate furcate feathery 

 hair. (Fig. 5d.) 



The inner side of the propodus, carpus, merus, and ischium, and the 

 outer distal margin of the merus and ischium bear a number of 

 rather short, stout, spiniform setae split toward the end. The 

 carpus has also a single very long seta split and curved toward the 

 end. The arrangement of the setae and the general shape of the 

 joints of the legs can best be shown by the accompanying figures. 

 (Figs. 4a and Qa.) 



The inner margin of the propodus of the first pair of legs bears 

 a»row of very short spines and is also covered with very thin imbri- 

 cated lamellae, {/Strukturse/mppe^i: Fig. 5e.) On the first pair of 

 legs in the male I find a special sort of lamellae scattered upon the 

 inner side of the carpus and merus, and the ischium distally ; on the 

 seventh pair they are present only upon the ischium and the adjoin- 

 ing part of the merus. (Figs. 5c and 4a.) These lamellae have 

 the free edge serrated. 



Penis bilobed at the end, as is shown in the figure. (Fig. 4 5.) 



