close together basally (Figure 217, A); anterior submarginal seta in form 

 of large, pointed, slightly yellowish spine, seta near posterior margin 

 forming a longer, thinner, light spine; primary posterior surface seta 

 situated basal to spines, brown, moderately long. Both primary ventral 

 setae of mid-femur situated basally, apical ventral seta in form of 

 large, moderately long, light spine, basoventral seta situated near base, 

 thick, moderately long; posterior primary seta situated in posterior area, 

 brown, moderately long; distance between the 2 ventral setae and to the 

 posterior seta about the same (Figure 217, b). Primary ventral setae of 

 hind legs situated in middle of segment some distance from each other, 

 apical ventral seta moderately long, brown, basoventral seta in form of 

 large, thin, light spine; posterior primary seta dark, long, situated 

 subventrally near apex (Figure 217, C). 



FIGURES 217 - 219. Apatania m a j us c ul a McL.: 



217 trochanter and femur, posterior, of foreleg (A), midleg (B) and hind leg (C); 218 - tergite 

 of segment 9; 219 — case. 



Lateral line from end of segment 2 to 7. Gills on abdominal segments 1—6; 

 ventral gills larger than dorsal gills; dorsal postsegmental gills longer 

 than the presegmental gills. 



165 



