43 



48 



FIGURES 45-50. Details of the silk glands: 



45 — longitudinal section through excretory duct and beginning of secretory part of spinning gland 

 of Limnophilus sp.; 46 —press; 47 —silk thread; 48 -gland cells of secretory part of gland 

 from distal part of the gland ofAnabolia nervosa (A) and from basal part of Limnophi- 

 lus fla vicornis (B); 49 — gland cell and its branched nucleus; 50 — pedal, maxillary and man- 

 dibular glands of Neure cli psis bimaculata (45,46, 47, 48, A, 49 — after Gilson; 48, B — 

 after Henseval; 50 — after Brickenstein). 



ou — outer part, in — intima, m — muscles, man — mandibular glands, max — maxillary glands, 

 pg — pedal glands, slk — silk thread, sec — secretory part, nuc — nucleus. 



38 



