Hind legs resembling midlegs, with the following differences: basodorsal 

 seta of coxa longer and thicker; both anterior and posterior distodorsal 

 setae also long; secondary dorsal setae of coxa more numerous than on 

 midlegs, setae short and long. Posterior seta of trochanter dark brown, 

 long. Femur straight, shorter than mid -femur, wider apically; both ventral 

 setae situated almost in the middle (Figure 138, C), basal seta in form of 

 small yellowish spine, apical seta short, spiniform. Tarsus and claw as 

 in Figure 139. 



Dorsal process of abdominal segment 1 slightly sclerotized, a row of 

 12—13 long, thin, black setae and several small setae lateral to it; lateral 

 processes slightly darker than other surface; ventral side convex, slightly 

 sclerotized, covered with small setae; small, sausage-shaped, white 

 appendages on a thin stalk lateral to convex area (gill?). Lateral line 

 on segments 2—8 with small, dark hairs. Single gills on segments 2—7; 

 filaments of gills long. 



Tergite of segment 9 chestnut brown, with light spots; posterior margin 

 with scalloped margin; medioanal seta long, black; intermediate and 

 lateral seta thin; anterior -angle seta dark, thick, long, resembling the 

 medioanal seta; 2 setae between the medioanal setae, one short, the other 

 long, light; sometimes 1—2 additional, light setae near the margin. 



Number and a 

 N.ussuri ens 



rrangement of gills of 



Segment 



Dorsal 



Pleural 



Ventral 



2 







1 





3 





1 



1 





4 





1 







5 











6 











7 











Sclerite "b" of anal legs brownish to dark brown, darker and blackish 

 ventrally; indistinct, large light spots near base on dorsal side; 3 large 

 black setae near apex, one median in the angle, another nearby, both long, 

 thick; lateral seta long, thinner, a moderately long, dark seta subapically 

 near the median margin; ventral seta short, black. Sclerite "c" brown, 

 with broad black outer margin; seta short, light. Claw (Figure 140) dark 

 reddish brown, blackish at the curvature and at the base; membranous bar 

 on the outer side, narrow in m.iddle, wider basally; dorsal denticle large, 

 light brown. Seta 1 on dorsal side of basal area, short, thick, light; seta 2 

 subdorsal, situated on outer side, long; seta 3 medially in distal area. 



101 



