seta of trochanter moderately long; anterior apical ventral seta forming 

 a short, thick, blunt, light spine, second anterior ventral seta closer to the 

 basal, also a light spine, but longer and thinner; basoventral seta brown, 

 long, like the 2 ventral setae. Posterior, primary seta of femur situated 

 ventrally, near middle of segment, brown, long; primary apical ventral 

 seta in form of large, light spine, basoventral seta brown, long, like the 

 posterior; ventral comb of spinules extending along the whole segment. 

 Ventral comb of tibia interrupted, spinules very small, several secondary, 

 short, light spines ventrally and subventrally. Basal seta of claw in form 

 of light spine, not longer than on the forelegs. 



Number and arrangement of gills of B. oval is 



Segment 



Dorsal 



Ventral 



2 







1 







1 



3 





 1 





 1 



96 



Primary anterior seta of hind trochanter light, short, branched as on 

 the midlegs; posterior seta larger, long, brown. Posterior primary seta 

 of femur long, brown, situated near apex; primary apical ventral seta 

 situated subapically, slightly smaller; a short, light spine ventrally in 

 middle of segment; ventral comb of spinules extending along the whole 

 segment. Spinules of the ventral comb of tibia sparse, small; secondary 

 ventral spinules short, light, 5 of them posteriorly, 2—3 anteriorly. Basal 

 seta of claw light, thin at the end. 



Dorsal and lateral processes of abdominal segment 1 large, lateral 

 processes displaced ventrally. 



Lateral line from segment 2 to beginning of segment 8; hairs small, 

 pinkish. Gills only postsegmental on segments 2—3, dorsal gills longer 

 and thinner than ventral. 



Sclerite of abdominal segment 9 (Figure 155) pale, indistinct anteriorly 

 and laterally; its anterior part with large dots; medioanal setae long, black 

 or dark brown; anterior -angle setae slightly shorter; intermediate and 

 lateral seta varying in size, the seta situated on the point of the intermediate 

 one longer than the lateral seta, sometimes very long; sometimes both 

 setae almost of the same size or seta replacing the lateral is larger than 

 the intermediate and very long; the proportions may differ on both sides; 1, 

 2, or 3 setae between the medioanal setae, middle seta long, slightly thinner 

 than the medioanal seta; one seta between the medioanal and the anterior - 

 angle seta in addition to the 2 primary setae; 2—3, thin, long, brown setae 

 on each side in the basal area. 



Sclerite "b" of anal legs light brown, with reddish brown, wide apical 

 margin laterally and ventrally; median apical setae and neighboring setae 

 black, long; lateral and subapical seta on median margin reddish brown, 

 long, thinner and almost half as long as the median seta; ventral seta 



115 



