PereliaEaston 1983

• Setae closely paired, pigmentation lacking, sometimes with brownish colour on dorsum,
• Prostomium epilobous, dorsal pore variable.
• Male pore on segment 15 fairly visible, usually with glandular crescent intruding into the neighbouring segments.
• Spermathecae open in setal line cd, nephropores irregularly alternate between b and above cd.
• Two pairs of testes in 10, 11, and two or four pairs of seminal vesicles in 11, 12 or 9–12. Receptacula seminis two to five pairs (sometimes lacking?).
• Calciferous glands with lateral diverticula in 10.
• Excretory system holonephridial, nephridial bladders “S” shaped with cephalad bent ental part and ectal looping that might be fused forming an ectal vesicle (sigmoid-type). The cross section of longitudinal muscle layer is fasciculate with well-developed radial walls.
• One species recorded in India viz.,