Dorsal and distoventral primary setae of mid- coxa slightly larger than 

 those on fore coxa. Both anterior distoventral setae of trochanter 

 represented by smaller spines. Femur with one ventral spine; subapical 

 process and spine- shaped seta of m.id-tibia smaller than on forelegs; 

 422 posterior subventral row replaced by a single subapical spine; thin 



secondary setae more numerous, like those of tarsus; anterior spine of 

 tarsus large, similar. Claw slightly longer, its basal seta in form of a 

 larger spine. 



Hind coxa less massive; femur, tibia, and tarsus narrow, rodlike, long; 

 tarsus shorter and narrower than tibia; tibia and femur about equal in length: 

 tibia with a membranous stripe in middle: the following primary setae are 

 distinct among numerous long, thin, secondary setae: both distoventral setae 

 of coxa; basoventral seta of trochanter moderately long, thin, situated at 

 suture and distodorsal seta of femur short, thin, directed posteriorly. 

 Claw modified into a thin-walled tactile organ with small setae; basal seta 

 large, longer than claw. 



Abdominal seginent 1 large, with high dorsal process; lateral processes 

 also large, displaced ventrally; abdominal segments 1 — 6 equally wide, 7 — 8 

 slightly narrower, segment 9 much smaller. Lateral line on seginents 3 — 7, 

 with small, dense, light hairs; segment 8 with a row of sclerotized dots, each 

 with 2 short thin chaetae (Figure 687, A). 



Gills presegmental, on segments 1 — 8, with 1 — 4 filaments; pleural gills 

 situated immediately below lateral line. 



Abdominal segment 1 with 3 setae lateral to dorsal process; anterior- 

 angle seta situated near lateral process; segments 2 — 7 with moderately long 

 medioanal and anterior-angle setae, and small anterior-margin and 

 posterior intermediate, and lateral setae; medioanal and lateral setae on 

 segment 8 longer. 



Tergite of abdominal segment 9 (Figure 687, B) yellow, rounded posteriorly 

 dark anteriorly, with small dark brown dots; setae at posterior margin, 

 medioanal seta, and anterior-angle seta long; intermediate seta and lateral 

 seta small, thin; anterior-margin seta situated subapically near median 

 seta, short; several, small, secondary setae near primary setae at posterior 

 margin. 



Sclerite "b" of anal legs dark in median dorsal area; median dorsal angle 

 with dark reddish brown spot: lateral and ventral parts yellowish; posterior 

 margin with narrow reddish brown margin. Three black setae dorsally at 

 posterior margin; ventral seta also dark; dorsal side of sclerite with 

 numerous secondary setae; those on dark median area in form of small, 

 light, brown spines; lateral spines thin, dark, moderately long (Figure 688, A). 

 Sclerite "c" short, triangular, with blackish brown lateral margin and a small 

 light seta. 



Claw of anal legs sharply bent in distal part (Figure 688, B), dorsal side 

 with 2 large and 2 small subapical denticles. Seta 1 situated dorsally in 

 basal part, moderately long, strong; seta 2 near suture; seta 3 larger, 

 situated more distally and closer to curvature; seta 6 shorter, lateral, distal 

 to suture; setae 8 and 7 situated ventrally one behind the other in basal 

 part; seta 4 situated ventrally near suture; seta 5 laterally. 



Case (Figure 689) made of sand grains, shield-shaped, consisting of a 

 straight tube, slightly narrower posteriorly and with large, winglike lateral 

 extensions; pieces of detritus sometimes among sand grains. 



529 



