Mid-tibia and tarsus massive, yellowish brown, much longer than on fore- 

 legs. Tibia with a dark spot dorsally; primary dorsal setae situated amon^ 

 numerous secondary setae; a row of similar thin, long setae ventrally; 

 about 65 secondary setae; primary distoventral setae in form of 2 strong 

 spines, anterior spine subapical and shorter than posterior. Distoventral 

 part of tarsus with a row of spinules, 2 of them longer than others; both 

 primary distodorsal setae short, thin, anterior seta slightly subdorsal, the 

 2 other primary setae slightly larger, subventral. Claw longer than 

 on forelegs, with a light, basal spine. 



Number and arrangement of gills of S. pe d e mon t a nu m 

 (after Nielsen) 



Segment 



Dorsal 



Pleural 



Ventral 



1 



1-2 





1 



2 



2-4 



1-3 



2-3 



3 



2-4 



2-4 



3-4 



4 



3(0) 



1 



2-4 



5 



3(0) 





2-4 



6 



2(0) 





2-3 



7 







1-3 



8 







2(0) 



544 



Hind tibia and tarsus thin, long, mainly with tactile function; tibia rodlike, 

 long, with long, thin, dorsal setae, ventral setae shorter, in 2 rows, pointing 

 in different directions. Tarsus thin, with a ventrodistal row of small 

 spinules; all 4 primary setae situated dorsally and subdorsally, 3 apical, 

 1 subapical. Claw thin, long, strongly curved, with a thin, short, basal seta. 



Abdominal segments uniformly wide; segment 9 much narrower. 

 First abdominal segment with a low, wide, dorsal process; lateral processes 

 small, with a stripe with a black sclerite at base and a dense cover of thin, 

 grayish spinules directed anteriorly and laterally (Figure 865, B). 



Gills (Figure 867) on segments 1 and 8, single or with 1. 2, or 3 shorter 

 and thinner branches at base, forming gills with 2, 3, or 4 filaments. 



Gills of segment 1 situated at base of dorsal process and slightly ventral 

 to lateral process. 



Lateral line absent; anterior half of segments 3—8 with a longitudinal, 

 lateral row of small^ light brown sclerotized dots; each sclerite on 

 segments 3—7, with a small, spine -shaped seta; a short, thin seta situated 

 before the row, a similar seta behind the row; these are the 2 primary 



678 



