3 20 



THE ROUND WORMS 



(a) Nocturnal periodicity. 



F. bancrof ti (F. nocturna) . Pointed tail ; loose sheath ; lashing movement. 

 300 X 7.5M- V spot gon from head; break in cells 50^ from head. 



(b) Diurnal periodicity. 



F. loa (F. diurna). Pointed tail; loose sheath; 245 by 7 microns. V spot 

 60 to 70 microns from head, break in cells 40 microns from head. 



GENERAL FILARIAL KEY 



