106. 



Ik- Tail sfiort, cylindrical, rounded at tip. B\iccal cavity complox, 



onchoLaimoid Phab dode-j'.ania Haylis and Daubney, 1926 



Tail clavate. Buccal cavity relatively simple 



....o Ja?er3kioldia Filipjev, 1916 



1^. Amphids covered by two plate-like setae Platycoma Cobb, I8'y3 



Aniphids not covered by setae 16 



16. Tail conical with flagelliun Metacylicolaimus Stekhoven, l'yh6 



Tail without flagellum 17 



17. Tail short, rounded Thoracostoraa Marion, 1870 



Tail clavate 18 



13. Buccal cavity vast, armed with an spical dentated band 



......... Cylicolaimus de Man, 1^90 



Buccal cavity narrow, armed with plates S ynonchus Cobb, 1393 



