Number and arrangement of gills of L. h i r t u m 



Segment 



Dorsal 



Ventral 



2 



1 





3 







4 







5 







6 







7 



1 



1 



depression, long, dark brown; nearby distally, 2 similar, large, secondary, 

 and a 3rd shorter, light seta; apical of 2 primary anterior setae dark, 

 reddish brown, moderately long; the other short, brown, situated subdorsally 



in basal part; posterior surface with 

 2 thin, moderately long, secondary setae 

 and 3—4 smaller setae; anterior disto- 

 ventral seta moderately long, thin, 

 dark brown, posterior distoventral seta 

 situated subventrally, short, brown; 

 posterior side subventrally in distal 

 part with dense, thin, light, hairlike, 

 adpressed spinules, which form a 

 continuous, furlike cover. 



Trochanter oblong, with straight 

 ventral side distal to suture; anterior 

 seta in form of large, light spine like 

 ventral spines; posterior seta thin, 

 dark brown, long; anterior distoventral 

 seta represented by a long, thin, light 

 spine, 2nd ventral seta the same, 

 situated closer to basal suture, slightly 

 posterior apical ventral seta similar; 

 subapical seta shorter and thinner; ventral side with slightly curved, hair- 

 like chaetoids in distal part. Femur slightly shorter than coxa, markedly 

 wider distally, with almost straight dorsal and ventral side; distodorsal 

 seta moderately long; basodorsal seta shorter, both setae brown; anterior 

 seta dark brown, situated subapicallyj posterior seta situated subventrally 

 near distal margin, long, dark brown; primary ventral setae in form of 

 large, light spines, slightly yellowish, pointed, situated subapically and in 

 middle of femur; thin, light, hairlike, slightly curved spinules on whole 

 ventral margin as on trochanter. Tibia shorter than femur, slightly curved; 

 dorsal group of setae consisting of an apical and a subapical pair; setae of 

 ventral pair represented by 2 light, pointed, large spines, posterior spine 

 situated ventrally some distance from margin, anterior slightly longer and 

 thinner, situated much more basally in naiddle of tibia; ventral margin, in 

 contrast to midlegs, with dense, light spinules, those near basal margin 

 smaller. Tarsus shorter than tibia, almost uniformly narrow; dorsal setae 

 situated in middle, one behind the other, moderately long, light, much shorter 

 than distodorsal setae of tibia; 2 other primary setae situated in middle of 

 segment; posterior seta subdorsally, large, brown, reaching apex of claw, 

 longest and thickest seta on tarsus; anterior seta in middle, brownish, 

 mioderately long. Claw, as on midlegs, long, slightly curved, its seta in form 

 of short, blunt, light spine. 



Abdominal segment 1 without dorsal process; lateral processes small, 

 situated more ventral than usual. Lateral line on segments 3—7. Gills 

 in form of long, single filaments dorsal and ventral on segments 2—7. 



Segment 9 without tergite; setae situated on a slightly thicker membranous 

 area; medioanal and anterior-angle setae long, brown, thin; 1—2 small, thin 

 setae between medioanal setae; 3 setae between medioanal and anterior- 

 angle setae, one of the 3 longer and thicker than others. 



5725 



444 



